Take a look at daily spending habits of people and this gives you an idea. I use bitcoin to pay for food delivery every week at least once. Granted, this is a Bitpay 3rd-party merchant... so it's not like I'm exactly paying a pizza shop bitcoin. But I think it's a start and when shops do see their bitcoin orders go up, they might one day want to take it themselves (and who knows their own lightning shop so they don't bother with Bitpay's ridiculous confirmation setup).
Shopping is a bit more problematic, but I'm not really an online shopper. I know some people who do tiny buys every now and then that adds up in a month! Make-up, clothes, accessories especially.
Honestly, I've been living off crypto since late 2017.. sure, seen a few ups and downs but I'm exchanging crypto on a daily basis through p2p connections / localbitcoin / localethereum and using it as my main income.
Same here, I wouldn't exactly calling it living off crypto, though. That's for someone who bought all his coins years ago and living on it.
I've been earning only in crypto since late 2017/early 2018. Up until Q1 2016, I was 100% earning in fiat. In fact, if you discount the few clients who insisted paying me through paypal, I was actually earning in crypto since end of 2016.
My trading (selling, 90% of the time) takes place about every week, and with a bigger or more frequent one times around 3rd week of month to pay off bills.
P2P most of my trades too.
I think I'm pretty unique in my BTC spending, well at least compared to the other people around here - I've only ever used BTC for fairly small transactions, as well as some places that accept it when I am online shopping.
Recently used the Moon app (this is a browser extension which basically allows you to spend your money on sites like Amazon) to go on a huge shopping spree for a laptop, and some other tech stuff. Was pretty crazy I could use BTC to pay for it, even if spreads where a bit high.