I think it's useful to think of this as a proxy to the fiat world. You can continue to use and hold your crypto where possible (hoping more places accept it directly over time), but have a way to spend it at existing locations that only accept credit cards.
I think the real death blow here is the 2.49% fee that Coinbase charges on every transaction for liquidating the crypto (I'm struggling to find this on their website, but I see someone posted it in another thread).
Yup people using this don't understand they are doing exactly the opposite of why Satoshi created Bitcoin. The whole idea was that users would transact directly with eachother avoiding middle men, especially banks and other criminals and robbers such as the governments and tax collectors.
