A cryptocurrency exchange, or digital currency exchange (DCE), is a business that allows customers to trade cryptocurrencies or digital currencies for other assets, such as conventional fiat money or other digital currencies. In other words, crypto exchanges work as a platform where crypto fanatics can sign up and buy, sell or trade in various cryptocurrencies. https://coincred.org/blog-detail/is-paper-wallet-a-real-thing-in-the-crypto-industry