Bitcoin is never going to replace the £.
Yes, and PC word processors would never replace typewriters, and email would never replace letters, digital cameras would never make film obsolete, online video would never kill off high-street video rental. Yes, very good that we have all those long-standing things still with us...
Erm...all of those things
are with us. I just wrote someone a letter the other day, with a fountain pen no less. And I'm not joking.
still with us. But if you tell someone that you used one of them, you have to ascertain you're not joking because using those things has come to be viewed as slightly ridiculous and a bit backwards. Nostalgia.
So maybe at some point in the future we will remember the good old times and (pretend to) pay something with good old paper money?