What you heard has a real and very recent basis. On March 31, 2026, Google's Quantum AI team published a technical report that shook the crypto world a bit. It's not that Google "has already broken" Bitcoin, but it showed that it's much easier than we thought.

Here I summarize the key points so you don't panic but stay informed:

1️⃣. The "attack" is 20 times cheaper

Until recently, it was believed that breaking the security of Bitcoin (based on an elliptic curve called secp256k1) required a giant quantum computer with about 10 million physical qubits.

*What Google said:** Their researchers designed new quantum circuits that could achieve this with only 500,000 physical qubits.

*The reality:** Nowadays, the most powerful quantum computers have around 1,000 qubits. This means that there is still a significant technological leap needed (we are 500 times away).

2️⃣. The "9 minutes" problem

This is the most technical and concerning part of the report. Bitcoin takes about 10 minutes to confirm a block. Google calculated that a quantum computer of that size could decipher your private key in about 9 minutes.

*The risk:** An attacker could see your transaction while waiting in the "mempool", calculate your private key, and send another transaction emptying your wallet before yours is confirmed.

3️⃣. At-risk wallets

The report highlights that about 6.9 million BTC (old wallets or those that reused addresses) have their public keys exposed. These would be the first victims if someone managed to build that machine today.

4️⃣. Is Bitcoin going to die?

**No.** The community is already working on solutions:

*BIP 360 (Bitcoin Improvement Proposal):** It is a proposal to upgrade Bitcoin to "Post-Quantum Cryptography" (PQC).

*Technical update:** Just as Bitcoin changed its address format in the past (SegWit, Taproot), it can do so again with algorithms that not even a quantum computer can break.

✅ **In conclusion:** Google does not have a red button to turn off Bitcoin today. What they did was warn that time is running short. Google itself set 2029 as the goal for all its own infrastructure to be resistant to quantum attacks, and suggested Bitcoin developers start to hurry with the upgrade.

It is a matter of technological "arms race". We will surely see Bitcoin upgrade before Google or anyone else reaches that half a million qubits.

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