i think better to you for looking new good concept altcoin, like steem, ethereum, it's have more chance to double your money, because altcoin have lower marketcap than bitcoin.
Yeah that is very true. I have some ETH lying around, and the only reason I'm still holding it is because of the recent pump that occurred after the hard fork. Other than that, I may be tempted to sell it due to the fact that its smart contract system is full of flaws. Just look at what happened with The Dao hack (although it was due to bad smart contract security when it was designed) Now the hard fork has proven to be a success, but still I am doubting about ETH since it still has a lot to fix before it can keep up with Bitcoin (if it will ever be).
Still, it is very good to invest into ICO coins as they usually turn out to be profitable once they hit the markets. I have made a very good investment with Lisk and Waves.