You're controlling the market by not releasing premined coins to suit the current high demand for them
Exactly how Diamonds work.
What?! With that argument you can say that every coin with premine is "controlled"
There have been hundred of thousends $ worth of Dero traded in the last days. That is not enough Dero for you? Keep in mind that the price is very low (mcap of ~4mil) and thus very few people are willing to part with their Dero, they expect them to be worth more in the future. If you offer a higher buy price, more people will be willing to sell their Dero.