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. )
Bitcoin is still the best coin if you ask me. In terms of usage and sustainability. It still has the highest dominance on the market and without it all of the other coins would not do well. It has the highest number of investors which is what is going to ensure that the value of bitcoin is always intact no matter what happens in the market.