If I were you, I will not do such thing as quitting into my physical job im exchange of focusing working into Bitcoin just to obtain higher income. You know why? It is because there is no such assurance that I can earn and obtain an income frequently or in the time when I needed it the most to sustain my daily life expenses. I will still continue to work into my physical job so that I can be sure to obtain and gain an income to support my needs while waiting for my income from Bitcoin. Better to do is to work into both for higher chances of gaining a large income.