Not everyone agrees to pay you in BTC! It really depends on where you live and what type of occupation you have. Also, how would you pay taxes? How would you buy groceries in a store that doesn't even know a B of BTC? and most important how you'll order stuffs from Amazon? Huh? And how would you show your source of income incase you're going to visit countries like in Europe and America or unfortunately some fraudlent lawsuit is filed against your company ? We cannot completely depend on BTC yet because billions of people still trust in fiat crap and bank is somekind of moronic temple to them. I've tried my best to accept payments in BTC even after giving discounts people don't agree to pay. I think it's still a long way to go...