How Binance Users Send Bitcoin On-Chain
Binance is the largest cryptocurrency exchange in the world by trading volume — and like every exchange, it holds the private keys to the Bitcoin in its users' accounts. Binance users who want to send Bitcoin on-chain from their own address need to withdraw to a personal wallet first. The reason is structural: Binance holds customer BTC in pooled exchange wallets, and all outgoing transactions from a Binance account originate from Binance's operational addresses, not from the user's personal address. Binance's scale does not change this mechanic — it just means the exchange address appearing in any blockchain record is a very large institution's wallet. Bitok Arena's review of Binance's withdrawal process found that the most common critical error is network selection, not address entry.
Binance holds more BTC than any other exchange — and none of those keys belong to its users. The Bitcoin you see in your Binance account balance is a database entry representing your claim against Binance's pooled holdings. Until you withdraw to a personal wallet, every on-chain transaction associated with that Bitcoin originates from Binance's address, not yours.
One withdrawal to a personal wallet changes this completely. A bc1 address on the Bitcoin mainnet, controlled by a private key you hold, is your on-chain identity for all subsequent Bitcoin transactions from that address. The exchange is no longer in the path after the initial withdrawal.