$BNB I'll assume you mean a **100-word description of BNB (Binance Coin):**

Binance Coin (BNB) is the native cryptocurrency of the Binance ecosystem, launched in 2017. Initially issued as an ERC-20 token on Ethereum, it later migrated to Binance Chain and now powers BNB Smart Chain. BNB is used to pay trading fees on Binance at discounted rates, participate in token sales, and cover transaction fees on its blockchain networks. It also serves in DeFi, staking, and as a payment method across partners. Binance conducts periodic “burns” to reduce BNB’s supply, aiming to increase scarcity. Over time, BNB evolved from a utility token to a core element of Binance’s ecosystem.

Would you like me to do the same for **BNB in Bengali**?