- sell 100 BTC at $40 000
- buy 100 BTC at $30 000
- profit = $10 000 per 1 BTC = $1 000 000
In short, do this only once, and you still have 100 BTC and $1 million in profit minus taxes of course.
Manipulations are cause of flips between supports and resistances. Strong support will become resistances with manipulations. Strong resistances will be broken and become a new support with manipulations.
News help manipulations. Whales control price and they don't need price to rise 100% (x2) to double their balance. 10 times with 10 % for each when the crowd are uncertain about the market will be enough for whales.