If this is a real use case (and frankly how often do you want to pay for something that you don't care whether you'll actually get?) you can buy a prepaid credit card (over the internet, from a reputable provider, using your normal credit card) and use that. No reason that couldn't be smoothly automated (indeed I believe some bank accounts will already let you generate an additional card number with a limited amount of funds). I suspect there's just very little demand for it.
> I didn't fully trust the merchant with my credit card info (how securely do they protect/encrypt it? could they be hacked? etc).
Your bank covers you if they are though.
> You completely avoided the main point of my example #3.
If people use bitcoin then people will use bitcoin sure. But that applies to any tradeable object. If enough people start giving each other baseball cards at christmas then people will start paying with baseball cards. What's the specific advantage that would make people want to give bitcoin?
> your cute story doesn't mean credit card fraud is a solved problem. In many cases the customer has NO RECOURSE for fraud. For example you cannot chargeback a transaction made more than 60 days ago. Some fraudulent merchants pretend to act legitimately but stall shipping (eg. claim delays, issues, etc) for 60 days specifically to exploit this fact
Most reputable card issuers will cover you for longer than the contract says. And even if not, 60 days of cover is still much better than the 0 days you get with bitcoin.
> Or if your PIN code is stolen and a fraudulent transaction is made with the PIN code, you will typically be held liable
Again, you're contractually liable but in practice reputable banks cover you at least the first time. Whereas if your bitcoin private keys are stolen, the money is gone and you'll never get it back.
> Give your money to a fraudster and he will run away with it, no matter if its bitcoins or dollars.
What's the non-fraudster option with bitcoin? Who's offering FDIC-protected bitcoin accounts?