why are many people willing to drop their jobs and prefer to focus more on the world of crypto like bitcoin?
Many people?
"Wanting" yeah. we would all want that, but for most people it will remain a "want" rather than willing to do so because for most of us btc is not enough to make a living and get extras too.
Moreover BTC is unstable so you need to be really confident when taking that decision that you will be ok even if things go down.
I really wouldn't suggest it to be honest. Stay with your job and have BTC at the side as your "Hobby" that you enjoy doing.