If you didn't need to worry about the technical junk behind the scenes that makes it work.. what would be the features of the perfect cryptocurrency?
For now I don't think there is any perfect cryptocurrency in the market, and I don't think their will be any for some few years until existing project begin to focus on perfection and not just creating a platform that could be used, one of the problem of many Blockchain project being built is that they don't always build a user friendly platform, which is very bad for adoption, people love a platform where everything is easy for them to understand without the need to follow any guide.
I think there are some good coins out there. But as they say that the fastest race has not been run yet, further improvement in the projects of these coins out there could really make them the best coins. For the time being, Bitcoin is gaining some good value and it should be considered as the best coin. There are some good altcoin as well. Binance coin is growing fast.