Anyone who uses "paper" Bitcoins deserves to absorb the risk of loss that obviously implies.
Gold was a pretty crappy currency. There was at least some argument to be made that paper was more convenient to use. The same can't be said of Bitcoin.
Yes, that's why the right to issue money had been eventually monopolized by just one bank, usually referred to as Central Bank...
Perhaps I should make my argument more clear. The implied assumption is that the evolution will go:
Bitcoins -> paper Bitcoins -> central bank
I'm saying it's much more likely to be:
Bitcoins -> paper Bitcoins -> Bitcoins