What makes it any different from the hundreds of failed ponzis? They all paid out in the beginning and disappeared after their bankroll grown large enough. How do we know the people behind this one weren't part of the others?
No sig here. This is a legit question.
My opinion: Same as all the other ponzis, so when depositing here you should expect the possibility of losing your BTC and should not think of it as a investment.
IMHO the basic principle of CrazyPonzi.com is fundamentally different from its predecessors like WeeklyPonzi.com or NextPonzi.com. All those games were based on classic Ponzi principle, where old players are paid out of new player's investment. But, at CrazyPonzi.com new players may also get paid by old players. How ? Because every investment/bet, whatever you call it, will get expired within 120 hour. So, if one investment/bet get 140% of its value within 120 hour, it will be paid off. Otherwise, it will expire and add up to the bankroll to pay the next investment/bet. In this process, bankroll itself is self-adjusting and hence never goes up. On the other hand, operator gets paid a commission whenever someone gets paid. This is how operator makes more from commission than he could make by stealing the bankroll. This was not the case for WeeklyPonzi.com, NextPonzi.com or its similar variants that run today. Hence running away with the bankroll is simply not economical for the operator of CrazyPonzi.com.
p.s. You should note that this is NOT an investment program anyway. This is gambling. I like to call it Social Gambling.
and without problems. 
