Look at all reviews this site makes it so hard to get enough coins to play without pouring TONS of real money into it. Once you get to high of a level you can bet the amounts they require to do missions or challenges without spending even more REAL MONEY. It use to be a fun game USE to but now they are definitely more concerned with money than customer service, I sent in a question of why they cut my bonuses to 10% of what they where (went from 400 billion to 40 billion) their said spend more.