Unless they make that completely seamless behind the scenes, I can't see that working. Most people don't use crypto and don't want to learn how. It also requires users to sign up for a crypto exchange, which requires people to register with a photo ID. Additionally, it is difficult to exchange exactly the amount you need to purchase something, because of how volatile the currencies are. You end up spending more than the cost of the thing you are buying, just to be sure that you have enough. And then you're in the digital currency problem of "I want the $3 skin but the smallest package I can buy is $5 worth of V Bucks", which always feels like a ripoff.