>>60609055 (OP)These crypto credit cards kind of suck balls because you end up with thousands of cost basis lines to keep track of.
You may not have to pay taxes on what you receive (cashback is considered a rebate) but you do have to pay taxes on your profit. So that 5% back from a purchase (like $0.50 worth of BTC) has a price that you received it at that you have to consider when you sell it down the line.
Maybe they'll fix the tax laws sometime soon so they aren't so retarded, but as it stands the crypto credit cards simply aren't really worth the effort. You're better off just getting a regular cashback card and then just putting those cashback rewards into crypto periodically.