Yea, that is what I think would happen. The cool think is that it would go unnoticed until you reach a really good player, trader, that works himself up to greater than 0.01 from 0.00000001 BTC, then he will be playing/trading for effectively real money.
In essence, Play money to a point that converts to real money if your good.
I am considering a Business Plan on it, don't know how the community would take it.
Maybe $1000.00 USD for initial investment, plus share on percentage of income. Just like the good old days, work for little with a potential for a big payday.
What I am thinking is a good free game on the AppStore, with a percentage for taken exchanges, through a central exchange. Or just an upfront, 0.99 USD price with decentralization exchanges.
Can't do it myself, currently I don't know Obj C, generally I program in the mundane Assembly triage for specific processors. Which is great for what I do, but not for gaming (would take way to long).
You might want to denominate you business plan in BTC rather than depreciating fiat currency and you'll get more takers ...