[EdHominem]

If you wait for a single confirmation you're almost 100% safe, and this is a feature that almost every wallet has. They alert when a transaction to an address of yours has been confirmed some number of times. If you aren't selling diamonds or fancy cars, online to anonymous people, the right number of confirmations is one.

For a server, it's just like another card reader with a different UI, it's not some high-tech payment box they need a PhD to operate.

(Spear-)Phishing emails often include your boss's real info, fairly convincing text, proper formatting, etc... They've tricked trained CFOs out of millions.

Using BTC is like using Instagram, there's a ton of complexity behind the scenes but if you aren't a systems integrator it's essentially seamless.