Cann u double your money or earn some extra by some safe investments?

If you earn double your investment in an year so definitely it is Risky investment.If you want a safe investment with GOOD returns with out Risk, you invest on Land/Real estate property as per your Choice.Even investment in Gold or so is also not a safe.For safe custody of gold is Risk.Hence investment on real estate property is always Safe.It will fetch you a Minimum Annual Return of 20% you invest anywhere.There may be chances your investment will be 100% or 200% if the situation war-rented.