I ever heard that people choose to quit their job for doing some crypto job. Whether it is trading, mining, or bounty. But I think that's the worst idea. Maybe they think that kind job like that can earn many profit but they doesn't looking at the risk and keep do it. Look at the market, they stay red and it will hard to get profit from investing or trading. GPU price is more expensive as well as a lot of capital to be spent when starting mining. Also Bounty Hunter has bad condition right now with too many SCAM ICO which caused some of them just wasted their time and doesn't earn anything.
How they can earn money for daily need if only depends on the crypto?
I think so, leaving your job is a not good idea. Why ypu want to sacrifies your job, your passion, your profession in a crypto which is experiencing its downfall? You can be part of crypto without sacrificing any important doing in your life. You just need to manage your time well and double your time to finish it on time.