It's a bit the same as people making fun of someone buying a pizza with bitcoin, now worth a hundred thousand. It wasn't at the time, and most likely people would've sold it long before when it started to rise. And the hindsight should then be just as much "if you bought a pizza at the time in USD, why didn't you buy bitcoin instead??".
So to me one should get the latter of the two alternatives. People only come out of the woodwork because it suddenly happened to be worth a lot.