What you suggest to do is a pump, and even if it was possible to do the effect of it would not last long without an influx of new adopters. But first of, it's hard to imagine that this is possible for us to perform. How many Bitcoins do you think we can buy if we summon up all our strength? Looking at the current daily trading volume, 4,343,805 BTC, and at the volumes of major exchanges, we can see that something we can call a significant amount should be around 100,000 BTC, an amount that a whale can sell in a minute.
The good news is that Bitcoin is now traded at over $5,000, and this is happening not because someone or a group of people are pumping it, but rather because the amount new adopters can buy is greater than that what whales can sell.
Well, when a tree is being cut off, as long as it wasn't cut off from the root, it will still grow again. What I'm trying to say is that it is not over for Bitcoin yet, and it's still going to grow again. Let's just watch what it is going to happen before this year ends and what will also happen after the halving next year. I'm very sure that there's going to be another bull run that will be bigger than that of 2017, though I feel like this is going to be lasting for ever.