There are so many altcoins with lot of features and different type of usage, some of them are fake and some of are very good.
What coin do you think technically the best among them? (Don't just judge by the popularity or by the market price. )
Best for what? For investments? Nobody know.
There are many unique and interestion coins on the market from technological perspective. So I think that Ethereum, Cardano, Waves, NEO, Monero - interesting projects.