Although Bitcoin has taken up 40% the coin market. But is it more worthy to invest in bitcoin? Since bitcoin can never replace the paper currency for the moment due to many complicated reasons, and most bitcoins are already acquired by a small sum of people. So if a kind of currency can't be circulated, what's the meaning of that coin. When it comes to ICO, and the release of altcoin, it means that you are investing in a company, you are holding equity in the company. If you think this company will have a bright future, it's always worthy to put your money in.
I think bitcoin is much better than altcoin. There are a lot of ICO's who fail and there is no way for you to get your money back once you invest on them. I have joined a lot of bounties for ICO's and only a few of the succeed. To be honest, I am thinking that the investors felt like they were scammed and their investment won't go anywhere. To be safe that sorry, I think bitcoin is better and a more secured investment.