If I were to trade cryptocurrencies for a living, I'd invest in so-called "promising" altcoins only for short term and would close all positions after certain amount of time, regardless of the price, because in my mind any new alt is just a pump and dump / ICO scam, and in the long run there will be no fundamentals to support the price - promises of revolution, disruption and so on only can get the price so far, sooner or later everyone realizes that no real progress is being made.