Well, 12btc profits was big enough for me, If I could try to earn atleast .5 or 1btc per month I definitely quit my job as well. In your part it seem this your passion that might mix of lucky. How could earn like that huge amount, maybe you also had a big capital to yield that profits over time.
Investment capital also needed to be checked and be balanced well, if you have good amount to begin with and if you are so good with what your doing, then investing and harvesting your profits will be next to be expected, OP have the skills and good understanding of potential next movements so he make a good position and take benefits with that knowledge.