And yet the market doesn't retreat more than 3%. This guy will run out of ammo soon and then what? There's only so much 27k USD can do to a market trying to gain 10 million or more in market cap. Just a matter of patience.
I don't get why he's selling like that... but that's none of my business
Because its primer, and he operates a botnet, (well, ok, not really a botnet, but might as well be), and the botnet operators are somewhat incentivized to keep prices low so that there is less interest in mining the coin.
So lets assume botnets are 40% of the hashrate now, at 80 cents / monero. We'll use 10k daily emissions for ease - so thats 4000 xmr / day. Due to xmr's relative small volume, you can control prices with a weeks worth of this emission quite easily. About $22,400 per week
Now, lets bump the price of monero to 5$. Somewhere between 80 cents and 5$, the GPU mining farms switch over to the monero network (from ethereum, litecoin, and Dash). Monero net hash is currently 12 Mh/s. 40% of that is 4.8 Mh/s. Divided by hashrate of 290x (700 h/s), thats 6857 GPUs. So it would take 6857 290x's coming online to decrease the botnets influence by half. So now they are down to 2000 xmr / day, at 2000 * 5$ *7, so we're at $70,000 per week. But the important part is the decrease in xmr they bring in, because the (free, but not free, if you're a botnet sympathizer, and thats ok) xmr provides them the power to control the price.
Take for instance this guy:
https://eth.pp.ua/stats/miner/?address=0xd9176cf582b2f51fad57941e0a84dfba0ed3620dan ethereum GPU farm operator, obviously. 1476 MH/s on ethereum is roughly 60 290x's. Whole ethereum hashrate 12744, which is 509 290x's. Now I don't know how much infrastructure is in the litecoin, dash, or other networks, but it could be calculated, and I bet there's ~7000 290x mining units out there.
http://www.coinwarz.com/cryptocurrency/?sort=hashrate&dir=desccheck that out - ignore the sha256 ones, and look for the network hashrate.
So obviously this is just a theory, but in general my point is there are logical reasons to provide a downward pressure on Monero's price.