Is it true that its wrong to hold coins for many years and never look back? Someone said coins can die in just two years, they can also lose demand and hype under a year, so how do one hold with zero worries?.
You should be more specific on what coin you are referring to. Some coin dies off even after 2 months and some after a year we still have project that are strictly on a pump and dump use. There are also coins that are meant for long term profit. In crypto investing based on what you heard is never a good investment method learn to do your own research on every coin you choose to invest in.