Exactly. It ends but it's annoying in the short term.
This was a massive eth sale today to try and control things. You will see it happen quite a bit. 
Discussion
Works minimally though they aren’t “controlling price” they’re making tiny dents in massive warship. And as time goes on their ability to trade against Bitcoin diminishes eventually to nothing.
Yes as long as there is no mechanism to control it. This is why taking binance down was important, they need a single fiat exchange (coinbase) to try and influence things on. They fail long term.