He who doesn't risk never gets to drink champagne.

Im going to have to look at your responses to this, as I would like to know the same. I suspect that Banks are the safest way to invest money and earn from it. $500 would take quite some time to compound in interest enough to get it to $1000. Most online sites for HYIPs are VERY unreliable.

Before you EVER invest money you must make sure that you have done the necessary calculation or at least have (more or less) confirmed data that in the end, you would be making a profit. DON'T just go ahead and give any random site money as an investment believing you would make more money. As the english expression goes 'look before you leap'. Investing doesn't necessarly make you double the amount usually maximum (well from what i have seen anyway) the most profit ever made was 30 % more than his investment (this might not be pin point accurate). I dont think its possible to double what you earn, but you will make a profit if you play your cards right.

investing money and earning is a very good idea but now a days there are many cheaters who creates a HYIP SITES and cheats people a lot. so if u want to invest your money try some good hyips which are standing from many days.