You can earn a lot of bitcoins, but in same time you can lose all your bitcoins.
Earnings depend on your stakes.
Yeah we all know that we can lose all our bitcoins fast but it depends in you because if you are wise you cant lose all your coins.
And about you can earn a lot of bitcoins i think playing gambling is not a job so its better to call it profit or lots of profit..
Not a job but still some people are there who make money out of this, so maybe he wants to know how those guys do it , I think the best way to win is bet all at 50% chance, if you are uck you survive, its better than continuously playing against a edge !