I'm only familiar with casinos/dice sites offering investments, but I can tell you that there are a few pretty decent ones that can get you fairly large returns. I'm currently invested in
YOLOdice (ref link). Their minimum investment is 0.005 BTC.
Thanks for the reply sir.
but i am scared with sites pertaining to gambling. Because of the fact that any minute it will collapse.
Ponzi/HYIP schemes are
much more likely to collapse than any gambling site. Gambling sites have incentive to stay open because the longer they do, the more money players wager and the more money they stand to make. Sites that open investing to the public usually take a commission on the net profits of investors and make money that way, so there's generally less risk than with things like bitconnect.