Currently is everything very cheap and altcoins are especially on their lowest price. IOTA, Tron or NEO now seems to be the best coins for buying. They have lost arround 80-90% of its value.
So if they reach again their All time high value, you will get 10 times more money!
of course, there are a lot of interesting projects on the 3-room market that can lead to very good prospects for the investor. But because of the current state of the market, it is best to buy the most rated coins.