Yes, bitcoin is a good investment because bitcoin is the first cryptocurrency, a digital currency, and its fragmentation, security, and anonymity are especially needed in the information age.
I agree with all of those things but for me bitcoin is a good investment because simply bitcoin is the king. There is no need to put some other words in that description, bitcoin is the king, when the bitcoin stand then all the other cryptocurrencies bow, when the bitcoin fell down then the other cryptocurrencies or altcoins also do the same which is simply a great indication that without bitcoin, there will be no path for the altcoins to follow.