Now, can you find enough liquidity in the market to turn a profit? Can you find it before it becomes aparent something is off in the bet?

It's a 0-1 bet that resolves one way or the other. If you were able to place the bet, the liquidity is there. But, yeah, if you can't make the bet in the first place without significantly pushing the market then you won't make as much.

Prediction markets should not be legal.