We don't really understand what happened. Bitcoin suddenly grew but the alts did not, and even decreased. I think the reason is that sharks are trying to buy more bitcoins, so this happened. The alts have suffered a lot from the sell-offs of high money investors.
How about the more logical reason that all these alts were pumped too high and too fast during socalled alt season and ICO frenzy?
How could most tokens that came out from nowhere and were not even used by anyone be valued so highly?
Because they had nothing more than pumps,,, plain and simple, that is all.