I don't agree with OP about a real job being better and more stable. It all depends on your working conditions, the country you are in, many other things.
I'll give you something to compare:
Guy 1:
Living in a country with an average net income per capita of $2000 a month.
Has monthly expenses (food and bills) of $1000
Earns $1800 a month in his day job working 8 hours a day (has to drive an hour a day to work, pay for fuel, sit 8 hours a day in an office).
He gets into mining and trading part time, earns $1000 a month on the average. Starts thinking that he might turn it into a full time thing, double the profits, stay at home, cut fuel expenses. Undecided
Now this is hard to say if he should or shouldn't do it. A stable job is always better if the only thing you'd be getting out of it is more free time and no need to drive to work every day, although in some cases it might be better for him like if his wife is working and he could stay home with kids instead of hiring a nanny or asking grandma to do it.
Guy2:
Living in a country when the average income is $600 a month
Monthly expenses are $300 a month.
Earns $500 a month working his ass off every day working for 8 hours + overtime in a physical job like driving a truck or unloading packages in a warehouse.
Starts trading, writing in a signature campaign, investing in ICOs, claiming airdrops. Earns $500 on the average.
In that case it would be advisable to quit that day job and focus on cryptocurrency. Physical work always strains your body and there's a chance of getting hurt while doing it.
It's not worth risking your health in a job that barely covers your monthly bills and food while you can get similar money sitting at home, sipping tea, watching the charts. There's also a high chance of doubling your profit.
If you have a career and a chance of climbing the ladder at work, stay there. If you're at the bottom and barely earning anything quit and focus on cryptocurrency while you're looking for something better.
This OP started with some really good comments and examples, unfortunately in the recent pages it dumbed down a bit and got one sided. Therefore I would like to highlight this brilliant comment...it is not that black or white people. I all depends on your specific situation.