It is not wise to leave your full time job just for trading crypto. As of now it is not stable and unpredictable. Maybe investing needs time but you should not sacrifice your job for it. Its better to keep your job, earn some money, fill in your financial needs and invest your extra money on it.
If a person want to earn limited money by hardworking and passion then job is suitable for him but if a person is smart and want to make things easy he will prefer trading over job because there are a lot of benefit in trading and those who are doing this their life style is totally change now and millions of people are now in trading and they are saying that they are ready to quit job for the trading because they make a lot.
In my suggestion I guess the one person should leave it's full time if she/ he is already established it's good fortune here in the digital world. Though this cryptocurrency can provide a profit that is higher than a profit that a company gives you, you must first make sure that you've already has established your investment.