Its not depende on the supply but on price. Even you buy back a $1000 a day, if the price is too low then you cant actually dragged down the price of the whole market for that coin. Some will eventually dumped on you when you supply the liquidity. Unless the project is really good and got some potential.
Yes, I agree. I think it depends on the market demand for the coin. if he just buys back a $1000 to increase the price but no one buys. it will be useless. we can't control the market