Man people are still using the "it's a currency" grift when discussing crypto, did the El Salvador failure really teach you nothing?
Also of all the cryptocurrencies Bitcoin is a pretty poor choice since it could be pretty well argued that it has lost the original purpose and devolved into a raw "line go up" financial instrument.
Buy food with Monero on an ebay type platform called xmrbazaar.
(https://xmrbazaar.com/search-category/food/)
Donate to non-profits in Monero
GrapheneOS says it's the only crypto that they regularly get recurring small donations in.