You are talking about Bitcoin whales but they already had bitcoin so they weren't in the position pushing it higher without selling first. Now if you meant by just big money, maybe. I think tether free money coming in was a bigger factor and it was just a plain old world wide mania. Everybody and their mother wanted in, that is it. No need to look for conspiracy when simple psychology explains it.
Now if manipulation both ways were so easy, we would just see Bitcoin stuck in a price range, because manipulators don't care about ideology, just profits. The danger of manipulation is that another whale might be playing the market the opposite way canceling each other's effect out.
All in all, it was and still is a mania with a shallow order book. You get the price going vertical than a 60-70% collapse. Look up similar stocks or short squeezes. Very similar charts, like VW in 2008. From 200 to 900 in a few weeks and back...
For weekend reading:
https://www.investopedia.com/articles/optioninvestor/09/silver-thursday-hunt-brothers.asp
Chart:
https://en.wikipedia.org/wiki/Silver_Thursday#/media/File:Silver_price_in_USD.png
By the way, after the collapse, silver's price went sideways for 20 years but it does have fundamental value and can not be copied or easily replaced.
'easy' is a relative term of course. The whales can get it back to $20k today if they want to. but that is not in their best interest now. retail is 80% in futures... in the cash market there is no short, but you can imagine that retail is very long at this point. so in the dump phase of the cycle, it's in the whales' best interest to sustain the price as long as there are still more retails 'buying on the dip'... otherwise it will just be a race to hit the best bid to get out... aka a race to the bottom.
silver is a better example than the nasdaq 2000 bubble. nasdaq is a revenue producing asset, so the recover is much faster (if you can call 17 years as 'fast').... non revenue producing assets like silver, once a cycle is complete, with retails stuck in positions under water... I wish everyone a happy long life, but the 'accumulation' of the next cycle can take multiple generations, as the current generation may never sell, their heirs, getting the stuff for nothing, will not care about the cost base and high water mark.... they will view this as a dead asset and will sell it for $5/coin or whatever they can get for a case of beer.... that's how whales will re-accumulate for the next bull cycle.... this is how the commodity game is played.
