Bitcoin is available on cryptocurrency exchange websites, where you can trade one currency for another. Join , techies from around the world. Joseph William. CoinMama is a bitcoin broker that specialized in the facility of letting you exchange bitcoin via debit or credit card. Coinmama lets you buy bitcoins with your credit card or cash. CoinMama offers high limits. What to Consider When Buying Bitcoin With a Credit Card When deciding whether to buy bitcoin via credit card purchase, there are a few things you should consider.