I have been doing this for a year already. Getting paid in Bitcoin, converting it into our own currency and that is what I'm using to pay the bills here in our home.
Even though that is the case for me, I don't think that you can call it "living on crypto" because I believe that the phrase means "your world is only crypto". You are using crypto "only" and being paid with crypto "only".

Volatility is the main reason for me why I'm just converting my Bitcoins and pay the bills immediately. You might be keeping some Bitcoins just to have some funds to pay for the bills next week but shit happens. Bitcoin went down and now you are having a problem. Living on crypto means you are using crypto "only" and being paid with crypto "only". That is what I think but I know that there are some who thinks differently. Living on crypto might be possible if only there are more establishments accepting it. I believe though that more will accept it in the next years to decades and someday we will achieve the life around crypto.