Not possible except doing your own bookkeeping in Bitcoin and using it as much as you can

And how is Andreas Antonop living? He says he gets paid in btc etc

Getting paid in BTC might be one of the things you can use it for but right now the people who have to be paid to let you live only want to accept the money their gang prints

1) use app that help you keep track of your btc spending for tax purposes 2) buy gift card (Amazon, Walmart etc) with btc 3) ask your boss or your customers to be paid in btc 4) lovely force all your friends to transact in btc among yourself