With sincere advice, you should not give up your current job to enter the Crypto market. You should have a large amount of capital and stable monthly income to be eligible to enter this market. This market is harder than you think, and the income will never be stable. You should consider carefully.
That's just the simple truth, check out all average rich people don't depend on one major source of income, and it's be said never to put all your eggs in one basket, so hold your job tight and still do cryptos and earn from the both of them.
Both are good, I mean you can invest in crypto as part time. if you have regular job then it is very good. You will receive fix income from your job and in crypto you can buy coins and hold then if you have time for trading or if you have no trading experience. But remember never quit your permanent job for bitcoin because it is not guaranteed and you may lose your money.