Hello, I advise you to read information about crypto exchanges from trusted sources and only then choose the right investment platform for yourself. The crypto exchange acts as an intermediary service, and the principle of operation is reminiscent of classic currency exchange offices. The profit is based on the spread - the difference in price between the purchase and sale of a crypto asset. Exchange platforms allow you to purchase popular coins and immediately send them to a crypto exchange or put them on your wallet, as well as exchange crypto for fiat and withdraw it to a card or electronic storage. I use Binance and everything suits me. Another very good way to make money is to use pamm services. The PAMM account manager is an experienced trader who trades your investments and receives a percentage of investors' investments from each successful transaction, while you receive your passive income.