There are several ways to purchase and sell Bitcoin. You can use an exchange, a P2P platform, or a Bitcoin ATM. Each of these methods requires you to first buy Bitcoin. When selling Bitcoin, you must have a BTC wallet. You can sell bitcoin through any cryptocurrency exchange, a P2P platform, or a Bitcoin ATM.
The cost of purchasing Bitcoin varies by exchange, but most exchanges offer a minimum purchase amount. The minimum amount is usually around $5 to $10. This allows you to buy fractions of the Bitcoin you want without having to invest a lot of money. This is similar to buying fractional shares of a stock.