what I think is that if this is manipulation, if you think logically the price of bitcoin will go down and it might be stable at $ 6000- $ 7000 and will switch to altcoin before halving, because after halving all traders and investors will again dominate bitcoin
I did not understand what your trying to say, the volatility will switch to altcoin or everyone will switch their investment to altcoin before halving 
.The bizarre crashes are nothing new and for the past two years the market was so stable and the people who are in the market for a long time will be surprised to see that kind of stability in the price and right now when we see these kind of volatility everyone is shocked
. Welcome to the bitcoin market and enjoy the volatility.