Everything goes up and down. There is not a single asset that grows 0.1% per day and never go back. There is only one reason why BTC dumped - its becuase it pumped hard before. You dont want BTC to dump? You need to stop it from pumping - taking it out from all exchanges and blocking P2P trading - impossible.
"bitcoin plummets"
now - BTC @35k
01.2021 - BTC @20k
01.2020 - BTC @10k
01.2019 - BTC @4k
"fall of bitcoin"
This is by far the best explanation I have ever seen about crypto price situation and people keep forgetting about it all the time. Bitcoin price always goes high in the long run and yet people do not realize it at all. Why do people think that every fall needs to be "end of bitcoin" every time we have a little fall. I mean I get it, it is a 50% fall but it is still way above what it was when we first started.
Same literal thing happened by the end of 2019 as well, we started the year at around 4k like you said, it went to 14-15k levels and when it went to 9-10k levels people acted as if bitcoin is done and they were all fearing but they missed that we went up nearly twice as much for the whole year, just because there was a bigger price in the middle of the year doesn't change the fact that each year the price goes higher and higher (with the exception of 2018 of course).