EDIT:
Also, the number of people to whom btc is attractive is less important than the type of people. It may be that there is never mass adoption of Bitcoin - it is also the case that throughout history most people never had any money at all. And even though most people never had any money, sound money has been extremely valuable nonetheless because most people don't know what to do with money anyway.
It is one of the many reasons it makes a piss-poor store of value.
(Of course the answer to the spike could very well be “somebody fired up the tether printer” plus “super shady exchanges did tons of wash trading/oughright made up fake transactions”.
Illiquidity is a bad thing, not an generally an indicator that something is an especially good investment.
Also your tendency to define things in binary terms (liquid/illiquid, value/no value) is troubling.
Why the struggle to pretend not to be able to tell the difference between Bitcoin and limited edition comic books?