Coinbase is a crypto exchange in the US and the second-largest exchange worldwide by trading volume. It is a prime destination for several US customers and is a fully regulated company. Coinbase has over 80 million users spread across +100 countries.Coinbase is a crypto exchange in the US and the second-largest exchange worldwide by trading volume. It is a prime destination for several US customers and is a fully regulated company. Coinbase has over 80 million users spread across +100 countries.