[newb question alert] and how do you get full time on btc? by trading, looking for profitable investments and mining, etc? can that fill your entire time?

If you have 0 capital on bitcoin then you cant do full time job on it people who tend to go full time with bitcoin are those people who had lot of coins on their wallet that they can use for capital and make an investment like trading, buying rigs for mining and even gambling for high bankrolls. I saw someone here won 200btc with his bankroll of 2000btc. 200btc is quite a lot already.