for now yes, bitcoin is my main income, because I am not working in the factory. but I will set aside some of my money from bitcoin and use it as a capital for new jobs in the real world.
yes, that's good, you just need to focus on what you're doing right now. you could get a bigger profit compared to the people around you. even I also do such a thing, although I need a real-world job to supplement my income.
No doubt bitcoin gives us more income than our job and it gives us more profit than any other investment, if you have some friends who are working day and night and you can working only with bitcoin so you will get more income than all of them, but still I use bitcoin as my 2nd way of earning because my job never get disturb with bitcoin, infect I get saving and I save a lot of money for my future as well, so bitcoin is my additional way of earning not main source of income.