Nano may have best technology and other quality you have mentioned but last week one of the world leaders refer to altcoins as "shitcoins"! It means bitcoin is the only coins that can stand for cryptocurrency both now and in the future. We have many coins that are now living in the past and nobody or few people are buying them now but bitcoin is increasing its dominant on the cryptocurrency market and that dominant keep increasing daily and I think nano is one of those coins that bitcoin is dominating. The future is there for us to look into what is happening now.