Not too easily. Once in a while there tournaments with fiat money prizes and IIRC the entry fee might be payable in coin. Even then, to be sure of making any money one would have to be a really strong player that already had a good deck.

Then again, I've only saw that once so far and maybe you had to enter with gems? E

So — long and short of it — to downgrade to fiat they really make you work at it. 😃