You can buy BUSD from exchanges, for the latest list of exchanges and trading pairs for this cryptocurrency, click on our market pairs tab (https://coinmarketcap.com/currencies/binance-usd/markets). You can purchase and redeem BUSD from Paxos: (https://www.paxos.com/busd/)
BUSD is 100% backed by reserves held in either or both (i) fiat cash in dedicated omnibus accounts at insured U.S. banks and/or (ii) U.S. Treasury bills (including through repurchase agreements and/or money-market funds invested in U.S. Treasury bills). BUSD is approved by the New York State Department of Financial Services (NYDFS). BUSD is issued by Paxos Trust Company, LLC (Paxos) in partnership with Binance and can be issued and redeemed without any extra fee. Paxos issues BUSD on the Ethereum blockchain. In addition, Binance offers a wrapped BUSD token (Binance-Peg) on BNB Chain. Please note: Binance-Peg BUSD is a Binance product; it is not issued by Paxos nor regulated by the New York State Department of Financial Services.