What they have is short-termism or high time preference. It's perfectly normal to be worried that Bitcoin would go down - after all, it went from $69K to $17K, why shouldn't they be worried about that?

There are two angles to approach this - one is long-termism, saving for 10+ years. Another is insurance against hyperinflation - after all, the $ debasement has already happened, it's just not fully reflected in the prices yet.