Description from cryptocompare.com
Binance will issue a number of crypto-pegged tokens on Binance Chain (BEP2 token format) in the coming days, starting with BTCB, a BEP2 token pegged to Bitcoin.
Pegged tokens such as BTCB, are 100% backed by the native coin in reserve, which is Bitcoin (BTC) in BTCB’s case. The reserve addresses are published for anyone to audit. The blockchain offers a much easier way to audit a crypto reserve than a traditional bank balance tether.
A trading pair will be created on Binance.com between the pegged token and the native coin, e.g., BTCB/BTC.