No I do not support bitcoin as a main income because we can't rely on something which can't be predicted,we can never speculate the price and being a cryptocurrency it may crash anytime.And only a few local merchants accept bitcoin as a mode if payment therefore you will have to exchange bitcoins in return of your local Fiat.And here the problem that we could face is that while exchanging if the bitcoin price is low we might go through a loss.Therefore it's never a good idea to rely on bitcoins as a main income.