Some credit cards now offer rewards in cryptocurrencies -- but not every card is the same In contrast to traditional credit card rewards offering points, cash and miles, a new generation of credit cards offer rewards in bitcoin, ether and other cryptocurrencies. Because you can use these credit cards to earn crypto rewards -- without incurring the trading costs that are typical when buying on an exchange -- they could be an optimal, low-stakes on-ramp to experimenting with cryptocurrency. Tha...