I don't think we can manipulate bitcoin price it all about supply and demand even if we all try to there will be only little difference is price as bitcoin users are many.
We really can't manipulate bitcoin's price because it's something that is automatically increasing and decreasing base on the supply and demand of it in the market. And if you wanted to do some manipulation you should be one of those people or group that holds a lot of it in able to contribute some movements of its price.
That is the basic way to determine the price movement, however, volume of demand could come from a group of people who are whales or holding a good volume of bitcoin, with that, they can create a fake demand which will increase the price and since that was just a manipulated demand, the price will eventually back to normal or could fall as some people loses some trust when the price is unstable or so volatile.
Maybe in the near future when there's a close to equal distribution of bitcoin we can see that the price movement was due to legitimate demand of the majority. This is just my opinion since I really cannot confirm if this whales still has power to manipulate.
"Fake demand" is still demand. Someone's buying bitcoins, thus, there's demand on bitcoins. No matter how many persons was buying bitcoins, that's still demand nonetheless.
There would never be an equal distribution of bitcoin. The same thing with fiat, there would never be an equal distribution of fiat. I think you should read this
article to realize that there would never be an equal distribution of wealth. And even if we get to do that, eventually, the wealth would not be evenly distributed because there would always be people spending more than others, and people earning much more than others.