I will invest my bitcoins in good casino sites from where I will get profits on regular basis as there are many reputed sites that are running since long time and even paying their investors regularly without any cheating.
There are many dice sites/casino's who are taking investment and offer good return. But have you heard/read about satoshidice? That site scammed/stolen hundreds of btc from investors. As far as I know it was old as well as reputed/trusted but as we can see it ended. So better invest those btc somewhere else.