Hello
it seem that those dumping prices are affected due to short orders of brokers which are using bitcoin and a financial instrument to make money, instead of its ideology of holding/ capital investment.
due to those bitcoin futures, there arent any " limited" bitcoins nomore, and those brokers or citiziens ( whom can contact brokers to buy them those futures ) , as they can buy them at its present value without using any wallet or register to annoying exchange platforms with tons of aml/kyc laws.
i think those 2 things are destorying the bitcoin as banks are also possible to go shorts via the bitcoin futures without having a problem with the regulations as its a stock market.
Bitcoin has 3 important characteristic and they are it is sustainable, versatile and volatile crypto currency and this volatile nature is responsible for this much flactuation in the valuation of bitcoin and moreover this is very common in every investment that the valuation flactuates but this time the valuation has been deflated to very low extent and I think this is all because many governments has denied to legalise bitcoin in their nation and this has left a very negative impact on people and now they dont want to invest into bitcoin and this leads to short of order.