Investing this kind of amount is not a joke. Investing to bitcoin doesnt guarantee you can double that safely. We all know bitcoin is volatile. Once it crashed. You're done. Theres a bank where you can invest your money. I think thats more safer. There are no way you can double that money easily. But if you want to double that amount quickly. Then you should go for bitcoin. But it will be risky. Try a make business like restaurant, store and other things like that.