Galean is right. To illustrate think of the inverse that happened with gamestop. As long as Nobody was selling prices went up, in that case it was a Bad Thing so the aristocrats did some dummy sales to inflate supply, lowering the price.

In this case it's the opposite, prices only go up if the only things that sell are going for a higher rate. You're confused because you're a functional human being and not a finance guru, to you a market with low turnover is bad, but to the bookies who place the bets all that matters is the sticker.