Basically altcoins are more profitable than bitcoin. Bitcoins are a good investment, but it can't go 100x or 1000 easily in a short timeframe like altcoins can especially those that are sleeping for ages, under the radar and very cheap.
Somehow, and they are still very much risky as well. I understand that we can hardly see such a huge percentage increase on bitcoin compared to altcoin where we have seen more than 5000% increase within a year alone, but who knows, anything can happen that can cause a huge surge for bitcoin and we may end up still seeing the impossible happening.
As long as you know what you are doing, you are sure of your strategies, know when to get in and get out without gambling anything, and then you can really be very sure to get the best of trading. This is still a very profitable environment and there is no way you can have it all for sure, but one thing is that you can make more profit than losses if you learn.