Until recently, when cryptocurrency became more mainstream, wallets were a lot more necessary. In the early days, several cryptocurrency exchanges fell victim to hacks. And at that point, if your crypto was stolen, there was no way to get it back. So how much is one bitcoin in dollars long-term crypto enthusiasts use exchanges only for trading, and store their coins in their own wallets. Nomics is a cryptocurrency data API focused on Price, crypto market cap, supply, and all-time high data. They offer Candle/OHLC data for currencies exchanges. Additionally, they supply historical aggregate cryptocurrency market cap since January of 2013. We hate spam more than you do Cryptocurrency Wallet: Before even thinking about buying cryptocurrency, you should understand the basics of crypto wallets. In essence, these virtual storage units are software that reflects your cryptocurrency balances according to their respective blockchains and lets you conduct crypto transactions secured by a mix of public and private encryption keys. Crypto wallets can be hot (software) and cold (hardware). The former are necessary for trading, but are less secure than the latter, which are disconnected from the internet most of the time.