Binance Square
#btcnewstoday

btcnewstoday

74,387 προβολές
40 άτομα συμμετέχουν στη συζήτηση
Tawhid User-7de81
·
--
Article
Is $65K a Good Price to Buy Bitcoin in 2026? 6 Years of BTC Data Give a Surprisingly Clear?Bitcoin ( $BTC ) price action has never been boring.Since early 2020, it has delivered historic bull runs, gut-wrenching crashes, and a jaw-dropping recovery to six-figure territory. Now, in 2026, the flagship cryptocurrency sits at a critical juncture.Notably, the Bitcoin price has corrected from a peak near $126,000. As a result, market participants are asking one urgent question: Is Bitcoin a buy at the current level? The answer lies in the data. Five charts, covering price trends, moving averages, daily return distributions, rolling volatility, and monthly return seasonality, tell a compelling story. Together, they reveal patterns that have repeated across multiple cycles. They also highlight where Bitcoin’s price stands today, and where it could go next. #cryptouniverseofficial #BitcoinDunyamiz #BTCNewsToday

Is $65K a Good Price to Buy Bitcoin in 2026? 6 Years of BTC Data Give a Surprisingly Clear?

Bitcoin ( $BTC ) price action has never been boring.Since early 2020, it has delivered historic bull runs, gut-wrenching crashes, and a jaw-dropping recovery to six-figure territory.
Now, in 2026, the flagship cryptocurrency sits at a critical juncture.Notably, the Bitcoin price has corrected from a peak near $126,000. As a result, market participants are asking one urgent question: Is Bitcoin a buy at the current level?
The answer lies in the data. Five charts, covering price trends, moving averages, daily return distributions, rolling volatility, and monthly return seasonality, tell a compelling story. Together, they reveal patterns that have repeated across multiple cycles. They also highlight where Bitcoin’s price stands today, and where it could go next.
#cryptouniverseofficial #BitcoinDunyamiz #BTCNewsToday
Bitcoin price today: slides to $68k as Trump’s Iran threat dents risk appetiteBitcoin ( $BTC )moved lower on Tuesday, slipping below $69,000, as risk appetite weakened ahead of U.S. President Donald Trump’s deadline for Iran to reopen the Strait of Hormuz or face potential military action. The world’s largest cryptocurrency last traded down 2.1% at $68,183 by 10:01 ET (14:01 GMT). Bitcoin had briefly risen above $70,000 on Monday due to optimism over a possible ceasefire, but failed to hold gains. Traders brace for US strikes on Iran as deadline looms. Sentiment deteriorated after Iran rejected a U.S.-backed ceasefire proposal and instead pushed for broader conditions, raising the likelihood of further escalation. Trump has warned that Iran could be “taken out” if it fails to comply by his 8 p.m. ET deadline, including threats to target key infrastructure such as power plants and bridges. The standoff has unsettled global markets, with oil prices surging above $110 per barrel due to disruptions in the Strait of Hormuz, a key artery for global crude flows. The spike in energy prices has heightened inflation concerns and driven investors toward traditional safe-haven assets such as the U.S. dollar. Bitcoin has increasingly traded in line with broader risk sentiment, with geopolitical uncertainty overshadowing earlier optimism around diplomatic progress. Focus is also turning to U.S. economic data, particularly the March consumer price index report due later on Friday. Higher energy prices linked to the Middle East conflict are expected to push inflation higher, potentially reinforcing expectations that interest rates will remain elevated for longer. #BTCNewsToday #StrategyBTCPurchase #TrumpDeadlineOnIran

Bitcoin price today: slides to $68k as Trump’s Iran threat dents risk appetite

Bitcoin ( $BTC )moved lower on Tuesday, slipping below $69,000, as risk appetite weakened ahead of U.S. President Donald Trump’s deadline for Iran to reopen the Strait of Hormuz or face potential military action.
The world’s largest cryptocurrency last traded down 2.1% at $68,183 by 10:01 ET (14:01 GMT). Bitcoin had briefly risen above $70,000 on Monday due to optimism over a possible ceasefire, but failed to hold gains. Traders brace for US strikes on Iran as deadline looms. Sentiment deteriorated after Iran rejected a U.S.-backed ceasefire proposal and instead pushed for broader conditions, raising the likelihood of further escalation.
Trump has warned that Iran could be “taken out” if it fails to comply by his 8 p.m. ET deadline, including threats to target key infrastructure such as power plants and bridges.
The standoff has unsettled global markets, with oil prices surging above $110 per barrel due to disruptions in the Strait of Hormuz, a key artery for global crude flows. The spike in energy prices has heightened inflation concerns and driven investors toward traditional safe-haven assets such as the U.S. dollar. Bitcoin has increasingly traded in line with broader risk sentiment, with geopolitical uncertainty overshadowing earlier optimism around diplomatic progress. Focus is also turning to U.S. economic data, particularly the March consumer price index report due later on Friday. Higher energy prices linked to the Middle East conflict are expected to push inflation higher, potentially reinforcing expectations that interest rates will remain elevated for longer.
#BTCNewsToday #StrategyBTCPurchase #TrumpDeadlineOnIran
Article
Btc Coin Market Overview 3 June 2025As of June 3, 2025, Bitcoin (BTC) is trading around $105,164, reflecting a modest intraday gain of approximately 0.27%. --- 📊 Technical Analysis: Support & Resistance Levels Resistance Zones: $106,000–$106,500: This $BTC range has repeatedly acted as a ceiling, with multiple rejections observed in recent sessions. $108,800: A breakout above $106,000 could pave the way toward this level. $111,980: Identified as a triple-top resistance on the daily chart, marking a significant hurdle for bulls. Support Levels: $104,200: Immediate support, crucial for maintaining the current bullish structure. $103,000–$104,000: A demand zone that has provided a strong base during recent pullbacks. $100,888: $BTC stronger support level, with a breakdown below this potentially signaling a shift in market sentiment. Indicators: RSI (Relative Strength Index): Currently around 52, indicating neutral momentum. MACD (Moving Average Convergence Divergence): A bullish crossover observed earlier today suggests potential upward momentum. Bollinger Bands: Tightening on the 4-hour chart, indicating a potential volatility expansion soon. --- 🔮 Price Predictions for June 2025 Short-Term Outlook: $BTC Analysts anticipate a possible dip before a breakout, with a projected target of $125,000. Mid-Term Forecasts: Changelly: Predicts a potential rise to $137,260, with a floor around $104,707. CoinDCX: Expects a rebound toward $110,000, contingent on a breakout above $108,000. Long-Term Projections: Investors.com: Analyst Joel Kruger envisions a bullish trend possibly pushing Bitcoin toward $145,000. MarketWatch: Historical patterns suggest a potential peak around $150,000 in 2025. {spot}(BTCUSDT) #BTC #bitcoin #BTCNewsToday #EDGENLiveOnAlpha #MarketRebound

Btc Coin Market Overview 3 June 2025

As of June 3, 2025, Bitcoin (BTC) is trading around $105,164, reflecting a modest intraday gain of approximately 0.27%.

---

📊 Technical Analysis: Support & Resistance Levels

Resistance Zones:

$106,000–$106,500: This $BTC range has repeatedly acted as a ceiling, with multiple rejections observed in recent sessions.

$108,800: A breakout above $106,000 could pave the way toward this level.

$111,980: Identified as a triple-top resistance on the daily chart, marking a significant hurdle for bulls.

Support Levels:

$104,200: Immediate support, crucial for maintaining the current bullish structure.

$103,000–$104,000: A demand zone that has provided a strong base during recent pullbacks.

$100,888: $BTC stronger support level, with a breakdown below this potentially signaling a shift in market sentiment.

Indicators:

RSI (Relative Strength Index): Currently around 52, indicating neutral momentum.

MACD (Moving Average Convergence Divergence): A bullish crossover observed earlier today suggests potential upward momentum.

Bollinger Bands: Tightening on the 4-hour chart, indicating a potential volatility expansion soon.

---

🔮 Price Predictions for June 2025

Short-Term Outlook: $BTC Analysts anticipate a possible dip before a breakout, with a projected target of $125,000.

Mid-Term Forecasts:

Changelly: Predicts a potential rise to $137,260, with a floor around $104,707.

CoinDCX: Expects a rebound toward $110,000, contingent on a breakout above $108,000.

Long-Term Projections:

Investors.com: Analyst Joel Kruger envisions a bullish trend possibly pushing Bitcoin toward $145,000.

MarketWatch: Historical patterns
suggest a potential peak around $150,000 in 2025.

#BTC #bitcoin #BTCNewsToday #EDGENLiveOnAlpha #MarketRebound
#BTCPrediction #BTCNewsToday #BinanceSquare #MarketPullback #BTCWhalesMoveToETH Blockchain analytics firm Arkham has identified approximately 6,300 $BTC worth $740 million as belonging to the United Arab Emirates government. The holdings were accumulated through Citadel Mining operations rather than direct market purchases. Citadel, a publicly listed mining company, is majority-owned by the UAE's Royal Group through International Holding Company (IHC). The firm operates an 80,000-square-meter Bitcoin mining facility on Al Reem Island, Abu Dhabi, constructed in 2022. Approximately 9,300 Bitcoin have been mined to date, with at least 6,300 tokens still held in government wallets. The UAE becomes the fourth-largest sovereign Bitcoin holder globally, joining the United States and United Kingdom in significant holdings. Abu Dhabi royal family member Sheikh Tahnoon bin Zayed Al Nahyan controls the Royal Group which holds 61% of IHC. Arkham's research also identified Phoenix Group, another UAE mining company, holding $3.2 million in Bitcoin assets.
#BTCPrediction #BTCNewsToday #BinanceSquare #MarketPullback #BTCWhalesMoveToETH

Blockchain analytics firm Arkham has identified approximately 6,300 $BTC worth $740 million as belonging to the United Arab Emirates government. The holdings were accumulated through Citadel Mining operations rather than direct market purchases.

Citadel, a publicly listed mining company, is majority-owned by the UAE's Royal Group through International Holding Company (IHC). The firm operates an 80,000-square-meter Bitcoin mining facility on Al Reem Island, Abu Dhabi, constructed in 2022.

Approximately 9,300 Bitcoin have been mined to date, with at least 6,300 tokens still held in government wallets. The UAE becomes the fourth-largest sovereign Bitcoin holder globally, joining the United States and United Kingdom in significant holdings.

Abu Dhabi royal family member Sheikh Tahnoon bin Zayed Al Nahyan controls the Royal Group which holds 61% of IHC. Arkham's research also identified Phoenix Group, another UAE mining company, holding $3.2 million in Bitcoin assets.
#BTCNewsToday LATEST: 📊 US spot Bitcoin ETFs saw $869.9 million in net outflows on Thursday, the second-largest single-day exit since they launched, as BTC fell below $97,000. {spot}(BTCUSDT)
#BTCNewsToday
LATEST: 📊 US spot Bitcoin ETFs saw $869.9 million in net outflows on Thursday, the second-largest single-day exit since they launched, as BTC fell below $97,000.
On November 15th, according to Onchain Lens monitoring, a "mysterious whale" has completely liquidated its long ETH position (25x leverage) in one of its wallets, facing a loss of $2.76 million, and has withdrawn funds from the HyperLiquid platform. The whale currently still holds BTC and ETH, and its main wallet still has $2.87 million in unrealized losses. [PANews] $BTC {spot}(BTCUSDT) $ETH {spot}(ETHUSDT) #BTCNewsToday #Ethereum @Binance_News
On November 15th, according to Onchain Lens monitoring, a "mysterious whale" has completely liquidated its long ETH position (25x leverage) in one of its wallets, facing a loss of $2.76 million, and has withdrawn funds from the HyperLiquid platform.

The whale currently still holds BTC and ETH, and its main wallet still has $2.87 million in unrealized losses.

[PANews]
$BTC
$ETH
#BTCNewsToday #Ethereum
@Binance News
#BTCNewsToday 👌👌 The crypto market is booming today. Behind which is the decision of the US banking regulator OCC. Now banks in America have got permission to work as crypto brokers. After this, there is a big change in the price of other cryptocurrencies including Bitcoin. $BTC {future}(BTCUSDT)
#BTCNewsToday 👌👌
The crypto market is booming today. Behind which is the decision of the US banking regulator OCC. Now banks in America have got permission to work as crypto brokers. After this, there is a big change in the price of other cryptocurrencies including Bitcoin.

$BTC
🚨#brakingnews :- Reuters reports that U.S. ground forces and United States Air Force assets are currently on the ground and active in and around Caracas, Venezuela. Multiple explosions have been reported and observed across the capital as operations continue. 🇺🇸USA started attacking Venezuela Gold to the moon 🌕 Negative NEWS for Risky assets like BTC 🪙 #BTCNewsToday $BTC $BTC {future}(BTCUSDT)
🚨#brakingnews :- Reuters reports that U.S. ground forces and United States Air Force assets are currently on the ground and active in and around Caracas, Venezuela.
Multiple explosions have been reported and observed across the capital as operations continue.

🇺🇸USA started attacking Venezuela
Gold to the moon 🌕
Negative NEWS for Risky assets like BTC 🪙
#BTCNewsToday $BTC $BTC
🚨 🚨 🚨 Altcoin_Breakout Is_Brewing — Don’t Miss It🚨🚨🚨 🚀TOTAL3 is forming another classic breakout pattern — just like previous cycles. Each time this structure appeared, it led to explosive upside moves. The chart doesn’t lie: momentum is building again🎪 Altcoins are coiling up below resistance. Once that breakout confirms, we could see a massive surge across the board. 📈 Ignore the fear. Ignore the noise. This is where wealth is made. Stay sharp✅$BTC {spot}(BTCUSDT) #BTCNewsToday #altsesaon #BTC #crypto #MarketRebound {spot}(ETHUSDT) $ETH $XRP {spot}(XRPUSDT)
🚨 🚨 🚨 Altcoin_Breakout Is_Brewing — Don’t Miss It🚨🚨🚨
🚀TOTAL3 is forming another classic breakout pattern — just like previous cycles. Each time this structure appeared, it led to explosive upside moves.
The chart doesn’t lie: momentum is building again🎪
Altcoins are coiling up below resistance. Once that breakout confirms, we could see a massive surge across the board.
📈 Ignore the fear. Ignore the noise.
This is where wealth is made. Stay sharp✅$BTC

#BTCNewsToday #altsesaon #BTC #crypto #MarketRebound
$ETH $XRP
Bitcoin Price Overview Current Price: Monthly Performance: --- 🏦 Institutional Activity Metaplanet's Acquisition: ETF Flows: --- 🌐 Macro Factors Influencing the Market U.S.-China Trade Talks: Federal Reserve Actions: The Federal Reserve's daily bond purchases are boosting Bitcoin and crypto market sentiment, with analysts expecting upcoming FOMC commentary to play a decisive role in Bitcoin's trajectory. --- 🔮 Market Outlook Resistance Levels: Bitcoin has broken out of its range-bound phase between $90,000 and $95,000, resuming its upward trajectory toward the $100,000 mark. Analyst Predictions: Some analysts predict Bitcoin could reach $150,000 in 2025, based on historical trends and current market dynamics. --- 📊 Visual Insights To enhance your content on Binance Square, consider incorporating the following visuals: 1. Bitcoin Price Chart: Depicting BTC's price movement over the past month, highlighting the recent surge to $97,000. 2. Institutional Holdings Graph: Illustrating Metaplanet's Bitcoin accumulation over time.$BTC 3. ETF Inflows Comparison: Comparing inflows between BlackRock's IBIT and other major ETFs.#BTCto100K#BinanceInsights#CryptoBullRun#InstitutionalBitcoin #BTCNewsToday #BitcoinMomentum #CryptoForecast #BTC2025Cycle $BTC
Bitcoin Price Overview

Current Price:

Monthly Performance:

---

🏦 Institutional Activity

Metaplanet's Acquisition:

ETF Flows:

---

🌐 Macro Factors Influencing the Market

U.S.-China Trade Talks:

Federal Reserve Actions: The Federal Reserve's daily bond purchases are boosting Bitcoin and crypto market sentiment, with analysts expecting upcoming FOMC commentary to play a decisive role in Bitcoin's trajectory.

---

🔮 Market Outlook

Resistance Levels: Bitcoin has broken out of its range-bound phase between $90,000 and $95,000, resuming its upward trajectory toward the $100,000 mark.

Analyst Predictions: Some analysts predict Bitcoin could reach $150,000 in 2025, based on historical trends and current market dynamics.

---

📊 Visual Insights

To enhance your content on Binance Square, consider incorporating the following visuals:

1. Bitcoin Price Chart: Depicting BTC's price movement over the past month, highlighting the recent surge to $97,000.

2. Institutional Holdings Graph: Illustrating Metaplanet's Bitcoin accumulation over time.$BTC

3. ETF Inflows Comparison: Comparing inflows between BlackRock's IBIT and other major ETFs.#BTCto100K#BinanceInsights#CryptoBullRun#InstitutionalBitcoin #BTCNewsToday #BitcoinMomentum #CryptoForecast #BTC2025Cycle $BTC
·
--
Υποτιμητική
🔥$BTC MARKET INTELLIGENCE ━━━━━━━━━━━━━━━━━━━━━━━━━━ 📅 November 12, 2025 | 10:00 AM IST ═══════════════════════════ 🚨 BREAKING DEVELOPMENTS ═══════════════════════════ ━━━━━━━━━━━━━━━━━━━━ 🏦 INSTITUTIONAL MOMENTUM ━━━━━━━━━━━━━━━━━━━━ ▪️ US Government Shutdown RESOLVED → Senate funding extension approved → Regulatory clarity restored → Market stability enhanced ▪️ $BTC ETF Flows REVERSED → Fidelity & Ark leading inflows → Institutional confidence returning → Multi-week outflows now positive ▪️ Pension Funds Enter Market → Major asset managers increasing exposure → "Digital Gold" narrative strengthening → Long-term institutional backing ━━━━━━━━━━━━━━━━━━━━ 📊 MARKET INTELLIGENCE ━━━━━━━━━━━━━━━━━━━━ ▪️ Whale Activity: ACCUMULATION MODE ▪️ Hash Rate: ALL-TIME HIGH ✅ ▪️ Network Security: $ $🔒 ▪️ Market Recovery: $1T+ Bounced Back ━━━━━━━━━━━━━━━━━━━━ 💡 KEY INSIGHT ━━━━━━━━━━━━━━━━━━━━ Despite volatility, Bitcoin fundamentals remain exceptionally strong. Institutional adoption accelerating, network security at peak, and regulatory environment improving. ━━━━━━━━━━━━━━━━━━━━━━━━━━ #BTC🔥🔥🔥🔥🔥 #BitcoinETF #BreakingNews #BinanceSquare #BTCNewsToday $BTC {future}(BTCUSDT)




🔥$BTC MARKET INTELLIGENCE
━━━━━━━━━━━━━━━━━━━━━━━━━━
📅 November 12, 2025 | 10:00 AM IST
═══════════════════════════
🚨 BREAKING DEVELOPMENTS
═══════════════════════════
━━━━━━━━━━━━━━━━━━━━
🏦 INSTITUTIONAL MOMENTUM
━━━━━━━━━━━━━━━━━━━━
▪️ US Government Shutdown RESOLVED
→ Senate funding extension approved
→ Regulatory clarity restored
→ Market stability enhanced

▪️ $BTC ETF Flows REVERSED
→ Fidelity & Ark leading inflows
→ Institutional confidence returning
→ Multi-week outflows now positive

▪️ Pension Funds Enter Market
→ Major asset managers increasing exposure
→ "Digital Gold" narrative strengthening
→ Long-term institutional backing
━━━━━━━━━━━━━━━━━━━━
📊 MARKET INTELLIGENCE
━━━━━━━━━━━━━━━━━━━━
▪️ Whale Activity: ACCUMULATION MODE
▪️ Hash Rate: ALL-TIME HIGH ✅
▪️ Network Security: $ $🔒
▪️ Market Recovery: $1T+ Bounced Back
━━━━━━━━━━━━━━━━━━━━
💡 KEY INSIGHT
━━━━━━━━━━━━━━━━━━━━
Despite volatility, Bitcoin fundamentals remain exceptionally strong. Institutional adoption accelerating, network security at peak, and regulatory environment improving.
━━━━━━━━━━━━━━━━━━━━━━━━━━
#BTC🔥🔥🔥🔥🔥 #BitcoinETF #BreakingNews #BinanceSquare #BTCNewsToday
$BTC
·
--
🚨 BREAKING 🇺🇸 Donald Trump on crypto: "Bitcoin is extremely powerful — more and more people now prefer to pay using crypto." $BTC #BTCNewsToday
🚨 BREAKING

🇺🇸 Donald Trump on crypto:

"Bitcoin is extremely powerful — more and more people now prefer to pay using crypto."

$BTC
#BTCNewsToday
Hello all pro entry 110k Long Now btc 108k 😑 Dump or pump ?? Can i close or hold?? Today up 111k possible or down trend 99k 100k ??? #btc #ETH #DOGE #solana #BTCNewsToday $DOGE $ETH $SOL
Hello all pro
entry 110k Long
Now btc 108k 😑
Dump or pump ??
Can i close or hold??
Today up 111k possible or down trend 99k 100k ???
#btc #ETH #DOGE #solana #BTCNewsToday
$DOGE $ETH $SOL
Investment Shift: From Precious Metals to Cryptocurrency For centuries precious metals like gold and silver have been considered safe-haven assets. Investors trusted them to protect wealth during inflation, economic crises, and currency instability. These metals remain valuable because they are physical, scarce, and globally recognized. However, the rise of cryptocurrency has changed the investment landscape. Digital assets like Bitcoin and Ethereum offer decentralized ownership, borderless transactions, and high growth potential. Unlike traditional metals, crypto can be stored digitally, transferred instantly, and used in modern financial systems such as DeFi and Web3. While precious metals provide stability, cryptocurrencies offer innovation and higher returns, although with more risk and volatility. Today, many investors diversify their portfolios by combining metals and crypto to balance security and growth. The transition from precious metals to cryptocurrency represents the evolution of global finance—from physical stores of value to digital financial freedom. #cryptocurreny #btcnewstoday #binancenewstoday
Investment Shift: From Precious Metals to Cryptocurrency
For centuries

precious metals like gold and silver have been considered safe-haven assets. Investors trusted them to protect wealth during inflation, economic crises, and currency instability. These metals remain valuable because they are physical, scarce, and globally recognized.
However, the rise of cryptocurrency has changed the investment landscape. Digital assets like Bitcoin and Ethereum offer decentralized ownership, borderless transactions, and high growth potential. Unlike traditional metals, crypto can be stored digitally, transferred instantly, and used in modern financial systems such as DeFi and Web3.
While precious metals provide stability, cryptocurrencies offer innovation and higher returns, although with more risk and volatility. Today, many investors diversify their portfolios by combining metals and crypto to balance security and growth.
The transition from precious metals to cryptocurrency represents the evolution of global finance—from physical stores of value to digital financial freedom.

#cryptocurreny #btcnewstoday #binancenewstoday
Is Bitcoin really the only crypto worth holding long term? When you zoom out and look at the charts, BTC is the only asset that has shown a relatively consistent upward trajectory since day one. Every cycle, it crashes… and every cycle, it comes back stronger. Should investors focus only on accumulating $BTC and ignore the rest? Or is there still room for other assets in a longterm strategy?$BTC #BTCNewsToday
Is Bitcoin really the only crypto worth holding long term?
When you zoom out and look at the charts, BTC is the only asset that has shown a relatively consistent upward trajectory since day one. Every cycle, it crashes… and every cycle, it comes back stronger.
Should investors focus only on accumulating $BTC and ignore the rest?
Or is there still room for other assets in a longterm strategy?$BTC #BTCNewsToday
$BTC Bitcoin plunged sharply today as BTC trades below key psychological support near $80,000, reflecting broad market weakness and liquidations across crypto markets. This selloff erased billions in market value and intensified short-term bearish pressure. Traders await stabilization signs before confirming support levels. #BTCNewsToday #bitcoin {spot}(BTCUSDT)
$BTC Bitcoin plunged sharply today as BTC trades below key psychological support near $80,000, reflecting broad market weakness and liquidations across crypto markets. This selloff erased billions in market value and intensified short-term bearish pressure. Traders await stabilization signs before confirming support levels.
#BTCNewsToday #bitcoin
Συνδεθείτε για να εξερευνήσετε περισσότερα περιεχόμενα
Γίνετε κι εσείς μέλος των παγκοσμίων χρηστών κρυπτονομισμάτων στο Binance Square.
⚡️ Λάβετε τις πιο πρόσφατες και χρήσιμες πληροφορίες για τα κρυπτονομίσματα.
💬 Το εμπιστεύεται το μεγαλύτερο ανταλλακτήριο κρυπτονομισμάτων στον κόσμο.
👍 Ανακαλύψτε πραγματικά στοιχεία από επαληθευμένους δημιουργούς.
Διεύθυνση email/αριθμός τηλεφώνου