Is this big fall can't rise up again?
Does bitcoin rise up again after this big fall or continue to fall and die?
Why bitcoin price shrink, anyone controls the price of bitcoin?
Bitcoin price is affected by the news related to bitcoins. For instance, if there is a negative news like a major exchange getting hacked, it will cause the prices to go down. A similar incident happened in case of Binance (which is one of the most popular exchange) and this may have caused the prices to fall. Another reason is that big whales have withdrawn all their money from bitcoins at $20000 levels and now investing in alt coins.