I will assumed that you are newbie to knowledge of trading and things around this place. Have you heard of crypto market makers? They are responsible for creation of liquidity and such people have money to make market to be liquid or dried because they have the money to make the market do their ways. If they want the market to go down, they have the power and if they want to pump the price, they also have the power and this is why even the centralized exchanges works with them hand to hand.
Some of the coins you see that are been listed on exchange and get pump, you think it's the traders that buy them and make it go up? No, it's not. When you check the number of people that are buying and selling, they bought most of the time to create a but pressure so the traders and retailers can dump with causing damage to the price. We have many of them out there and doesn't work with exchanges, they operate independently and can make any coin do their ways, manipulate people into buying and sell when they like. That's how this market works.
I do not think that they have the "power" because if person A doesn't make the market and leaves, then person B will make the market and take that profit. Since there is a profit to be made from it, we won't see everyone leaving all at the same time unless there is a huge bear market, this is why I think we are not going to see everyone leaving the market alone like that all that easily, it will not be similar at all.
We are going to see one or the other end up making the market and provide liquidity so that they could make some profit. I have seen this even further at DEX, where people who put money to provide liquidity were rushing as son as others left, so they could make that profit. Manipulation exists of course, just not that way, not too much at least.