when an interviewer asks you what is backing Bitcoin say "it is backed by hundreds of thousands of ppl who have made a conscious decision to not let their govt's devalue their money every time a bank demands a bailout".

when someone like David Birch says that fiat money is backed by the govt's power to tax don't just let that go w/o a response.  say "oh that's just great...you mean our gov't can not only devalue our money by printing it for their own purposes but also back that same money by taking even more of it away from us via taxes?".