Likewise, it's not a bitcoin scam when bitcoin is the method of transfer, just like it's not a US-dollar scam every other time dollars are used in theft.
I think simple account takeovers started being called "hacks" jokingly on Facebook, when a friend would find your phone or computer unlocked and logged in.
You mean electronic us dollars? I doubt you'd be able to recover physical us dollars if they were scammed.
Social engineering is when your target is unaware that what he does is wrong or will do damage.
Opening a CMD and executing an "echo YOU HAVE VIRUSES", or repeatedly executing TREE command, are used in practice to bait people into paying for "malware removal" and "anti-hacker protection".