I _have_ used it - for example, Visa/Mastercard won't allow you to buy marijuana seeds, even in jurisdictions where it's legal, so crypto is great for that.

But over the last few years, bitcoin has gotten _harder_ to use for transactions, as the blockchain has gotten more crowded. In theory, the "lightning network" is fixing that problem, but at this point I usually transact in other cryptocurrencies - there are plenty of them that have stable enough prices for that! But I still own bitcoin as speculation and as a sort of savings account :shrug: It's been a good investment so far