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Well, pyramids tend to last pretty long, just look at those in Egypt, China, etc.
This is just a game, not a ponzi or whatever your reference was.

A game that has an in game store for real life cash to help you get down to those lower levels in hope of gaining enough points to earn a bitcoin..... Lol seems legit

Are you referring to offers?
Have you even checked it out?
To me it seems like you don't know what you are talking about, you can't invest in the game unless you choose to complete offers that are not game related, they are there because it was one of the easiest things to set up and get the game going.
Are there people who spend money trying to complete offers? Of course, but the game is absolutely free to play, I haven't spent anything on it, haven't completed a single offer, not that there are many for my country anyway and I'm leading the leaderboard. Hmm, scam much, right...

Keep playing