Go to coinmarketcap site and select top 10 altcoins and diversify your investment in those coins and those coins will not disappoint you in long term as investing in any other sites is very risky as they will surely run away with your money in long term but make sure that you do good research before investing your money anywhere.
Yep! Coinmarketcap is the answer on what you should invest your money with.. I always go with the top 10, those are the best when it comes to volatility and profit