How can there be any cryptocurrency which is better than the Bitcoin?
Bitcoin is the original crypto, while the other shitcoins are shameless copycats. A few of the altcoins, such as Litecoins and Namecoins can be trusted, but they by no means are superior to BTC.
Bitcoin is the original one, doesn't mean it is the best.
We all know that bitcoin is not perfectly, there are some coins really improve bitcoin.
But as the best, I think there is no best, just better.