A cryptocurrency exchange, or a 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.
Top Cryptocurrency Exchanges Ranked By Volume | CoinMarketCap
A cryptocurrency wallet is an app that allows cryptocurrency users to store and retrieve their digital assets. As with conventional currency, you don’t need a wallet to spend your cash, but it certainly helps to keep it all in one place. When a user acquires cryptocurrency, such as bitcoins, they can store it in a cryptocurrency wallet and from there use it to make transactions.