I know a lot of people who quitted their day job to trade in the cryptocurrency market.
But it was when the market was good.
In this bear market, they're struggling very hard to survive.
So I think the best way to invest is this :
Have a side job, cut down your expenses, then invest 10-20% of your monthly income in the market.This way you never have to worry about gain and loss and surely you have higher chance of getting rich because the market will recover in the long run!
Your advice is quite interesting, but why should we invest 10% -20% to crypto? because of the possibility of rich? the risk in invesment you can lose in it and the money you set aside, 10% -20% can be lost for free, actually I don't really accept opinions about "invest what you can volunteer" while the purpose we invest is profit.
You have your own way, maybe OP feels comfortable with 10-20% of his/her salary income to invest after having a real job, it's alway good for anyone to follow his own way and not to rely with anyone, if you love to make things worthy aside from your money invest also your time to understand the whole
setup of this investment process, after you have a good knowledge for sure you'll find comfort whatever market trends is showing around.
Invest and expect benefits out from your money, that's the sole purpose and real intentions of it.