Bitcoin does not have 0 use cases, it has ~1 that's extremely rare in practice, so much so that it's usually not worth using bitcoin. But it does have a usecase. Something something spherical cows.
Once you convert Fiat to crypto, its easier to spend than using a debit/credit card.
Getting it from Fiat to crypto is the hard part. After that you literally scan a QR code or type in an email.
Its my preferred way of paying because I always have my phone but I dont always keep my wallet in my pocket. I dont need to add my address and birth date. I just send money.
Also, to clarify, I'm not a fan of alt coins(at the moment) only Bitcoin I believe is useful. Between coinbase Email, Shift card, and the usual on-chain txns, Ive basically made the change to Bitcoin lifestyle.
The vast majority of people would find it burdensome to convert their money to another currency, and then use that on a normal basis. Of course if you ignore the hardest part, it's "easy".
There are so many options at this point that I never get why anyone makes this about crypto currency. Most of these options are older and more widespread than Bitcoin as well.
It is until it isn't.
- Got screwed by a vendor and want to issue a chargeback? Nope. Can't do it.
- Sent to the wrong address because of a typo? Sorry for your loss!
- Got your wallet emptied by a malicious program running on your computer? Sorry for your loss.
- Too many people using the crypto, resulting in confirmations taking forever and/or costing a ton? Too bad, so sad!
- Fiat price of crypto swung widly before / after transaction resulting in your purchase costing far more / less than expected? Should have hodl'd buster!
- Want to convert all that BTC into fifthly dirty fiat? Better find an exchange that actually pays out in USD and not tether. Also better hope that said exchange actually has the money and isn't insolvent.
etc...
This is easily one of my favorite parts about Bitcoin. Scan the address and you are done.