Depends on what you want it for. If you want it for collection purposes then you should get the hard copy there's even a limited version if you want if you want to just play the game the digital copy would be better so you wouldn't need to carry too much games with you on the go if you go on a...
Technically, cryptocurrencies aren't illegal, as long as you don't use it for criminal activity. If you sign up with an exchange, and that they get a tip from law enforcement, they have the right to freeze your assets.
@SylverReZ, speaking of crypto i remember reading about a guy who spend like 10 grand bitcoin on a couple pizzas (when bitcoin wasnt as worthy as nowadays)