I think OP wants $200-$300 drop in price in one day and $250-$350 rise the next day so he could profit trading bitcoins
that's not going to happen or at least not the way you'd like it to happen as more and more exchanging companies getting regulated price manipulation becomes harder but not that much.
There might be also some reason for that which I guess many people trying to mine themselves with ASICBOOST and stuff.
Another reason, this is a free market and things like this happens, we need stable market with snail speed growth otherwise it would scare away non risk taker investors.