Is it good to leave my job to dedicate myself to full-time cryptocurrency?
Not a good idea! There is no certainty in cryptocurrency due to the high risks involved. Having your job while doing crypto on the side would be a better choice. Doing both is manageable and is not hard to handle. You just need to learn to manage your time and know your priorities.
Doing both at the same time is looking managable but it should be harder than we think. It would take too much time from your daily life and you would probably become depressed while you're trying to manage both.