Who are "they"? Whales or some kind of pump and dump group? Did you know that quantum computers are not mass produced? Only few companies or sectors have this quantum computers like Google and IBM and the rest are being used for scientific purposes. So are you saying that by "they" they suddenly got their hands on this super computers and the first thing they do is to some "hash calculation"?

What you are seeing is just the normal pump and dump practices, and no, quantum computers are not involved in it.