Is I understood it right?
why Bitcoin perpetual have higher volume then spot?
do institution with huge capital try to move the spot price of bitcoin in their favor? to get high profit from perpetual.
do they divide their capital in two?, one for spot trading to move the price and one for futures trading to maximize their capital by leverage?
Do derivative/perpetual volume impact the bitcoin price in spot?
Do liquidation in perpetual impact price of bitcoin in perpetual and spot?
Correct, but I disagree with your point where you said the "institutions can move Bitcoin price base on their favor".
It means many people are interested to trade in perpetual instead spot.
No one can answer it, that's just a conspiracy.
Similar like third answer.
When there are supply and demand, there's always an influence to the market regardless how small or big the effect is.