The funny thing is that when a cryptocurrency is moved out of exchanges, it loses its value... So when investors think they are bumping the value up, the exact opposite is happening, because people still continue buying, but at a lower price.

The thing about decentralized exchanges is that they actually don't affect the value of the cryptocurrency as much as centralized exchanges due to higher fees.

It's the same as small group of people filling their own orders on centralized exchanges. Basically only trading volume goes up, exchange rate bounces back and forth between same boundaries...