Exchanges. Centralized exchanges offer a quick exchange of Bitcoin (BTC) to dollars. The commissions are minimal. However, you must create and verify an account and comply with KYC/AML requirements. Additionally, there are some limits on the amount for exchange operations. Decentralized exchanges are a bit simpler. The advantages include maintaining anonymity, no limits, fast order execution, and favorable exchange rates. However, exchange operation commissions can be high.