Maybe they'll find solutions. Cool, let them put those solutions in practice in 2040 when all the bugs have been worked out.
It was never a solution in search of a problem.
In 1999 the tech wasn't there but everyone could see where it was going, like all investments, it was a matter of timing.
Crypto is still at the fundamental research phase and we don't even have consensus that it does more good than bad, yet.
And yes, I know about the supposed use for people in countries with unstable regimes but I'm not convinced at the moment. Plus that use case, being that of people generally having low disposable incomes (barring China) absolutely doesn't justify the market value of crypto at the moment.
That's your best argument against regular currencies? That they're being manipulated, too? :-)
That's exactly what Bitcoin miners do: They take pure thin air and convert it into noxious power plant fumes. Pure air is what the odiferous Bitcoin is conjured out of.
Just to say, it really doesn't make sense to judge "crypto" by the state of Ethereum. There are different philosophies, different approaches, different people.