How to double your BTC in a week? NOT

HOW TO LOSE YOUR BTC IN A COUPLE HOURS! YES

I got several hundred percent profit in a few hours. Then I withdrew everything. So the statement used to be true.

Did you absolutely can withdraw your bitcoins anytime?

When people pay in, you can pay out. I clicked withdraw just before the shitstorm on here began and everyone started to withdraw.

So... doesn't this define a ponzi scheme? Can't withdraw until another sucker is found?