Selling cryptocurrency for fiat money works similarly to buying, only your choices are slightly more limited:
1. Services. Places you can sell crypto relatively easily and cheaply.
Coinbase is something between an exchange and a wallet and provides an excellent, relatively easy and cheap (low fees) way to buy and sell bitcoin, ether, and litecoin via a fiat bank account or credit card. The only thing is they don’t provide their buy/sell service in every country. Check out if you country is supported here.
2. Exchanges. Selling cryptocurrency with fiat money on exchanges is one of the more complex ways to get fiat, just given the registration and setup processes. Each exchange has its own terms for registration, etc. Here are the exchanges we recommend for selling bitcoin: DSX.uk, Binance.com, CEX.io, Gate.io, HitBTC, kucoin