Investing is advisable to do right now ,cause a lot of investing and cloud mining turned into scam.
Someone's luck would not work everyday to make him earn profits from gambling where people always lose they capitals in no time and i think gambling with that amount is just like investing the money into a ponzi scheme where you know you may wont get your money back and if you get it then it would be doubled and i personally wont invest if i know such a thing.
i think all suggestions had been laid out all ready for OP and its up to him now which advice to listen.
My advice to OP for a win-win situation is to lend his money to some users and accept collateral. This had been proven a good business here of course there are still risk but you know what to do, sign message is important.