In my country only 4 out of 10 people have a job. So if I quit my job, to concentrate on
BTC and it does not work out, my kids go hungry.

Never quit a sure thing, for something that could be gone tommorrow.
There are too many factors to take in consideration, for you to decide to do
BTC full time.
Keep it as a hobby, and should you loose your job, you would have a stable income to fall back too or fund your retirement.
But some people made a lot on
BTC and might retire early.
