It is possible to buy cryptocurrencies using a credit card, but most major issuers don't allow it. You may also be charged fees, and you won't likely earn rewards for your purchases. In addition, some exchanges will charge more for credit card purchases than others. Finally, cryptocurrency is very volatile, and buying it with a credit card means taking on debt for an uncertain investment.
Buying cryptocurrency with a credit card offers a few benefits, but you may want to avoid running up a large balance. This way, you won't miss out on the big upward swings and earn rewards for making future purchases. Additionally, some cards will treat your purchases like regular purchases, which means you'll likely get lower interest rates and rewards back on your spending.