Most high net worth individuals keep their wealth in stocks and shares. This is not what hoarding means.
The comparison to crypto scams is absurd.
Fortunately, we do not have to rely on our beliefs here, we have an objective measure, which we call "money".
If someone starts a company in their garage, and a decade later that company is worth few billions of dollars then that's the value this person brought to society - because people willingly paid them those billions of dollars for their product/service.
Of course the whole logic breaks down with purely speculative financial assets such as crypto.
What? You don't think the two measures would converge? In either case, the one with more market power would use that to improve their side of the bargain? Who'd've thunk...
What was the value FTX or Theranos brought to society?
"Provides value" is loosely connected to "expected future value", but it's certainly not the same thing.
But back to your point: it is possible to simulate either or both of those things and have eager investors get in early, but that's why they (probably) get in for less money than if the company had done what it claimed. They took a risk, and taking a risk is one of the valuable contributions one can make to a company.
They're all hoarding wealth and offloading risk on others, it's just that in comparison, the crypto-rich are not (yet?) a social class with an army of lobbyists on its payroll.