You can always use bitcoin, anyhow you want it just like the usual fiat currency. This is possible if the people you are dealing with understand how blockchain technology works. So you need to educate the people around you about how amazing bitcoin is, so you can easily transact businesses with them.
Yeah, but what about huge price spikes. Do you think this is sustainable? Do you want to buy something that will be twice higher or cheaper tomorrow? Btc can be used tied to fiat values only.