The platform where you can buy and sell cryptocurrencies is a cryptocurrency exchange. Some coins can be exchanged for others or bought for fiat or real money. For example, you can exchange bitcoins for litecoins, buy them with dollars, or withdraw your cryptocurrency balance as cash. Since the Bybit broker offers competitive commissions, I advise you to use it. More information about bybit exchange fees can be found here https://tradersunion.com/brokers/crypto/view/bybit/bybit-fees/
