i agree. hyips can be a sort of gambling because of the risks you are taking. gambling is a game of luck but on hyips , you can guarantee a profit if you know how and when to invest in a certain site. on hyips, the saying "the early bird catches the worm" applies.
But recently many hyip sites are closing quite faster and some even closed after couple of days so it is bigger risk than gambling. Because in gambling I will bet only on those games where I know what will be the end result but some times only it can fail. In hyip you don't know when these sites are closing. So I think these two are different.
yeah i forgot to mention that
of course there are bigger risks playing with hyip aka ponzi sites cuz they are made to scam. still i believe hyip is a form of gambling. if you take risks with something, then its gamblingYes thats what i was saying. It has become a sort of gambling risk now a days with the scam especially. u can never be sure. the ones who get out quick with some profit are the winners
Two days later you found more and more users complain unable to withdraw the principal! Then you try to do it but fail! You just see the figure increasing in the account day by day! But you cant spend it! 
