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...
Problem is you are expecting a clever electronic etch a sketch to replace word processors. That just isnt going to happen either. Bitcoin is a lot of things, but an viable general alternative to fiat currency, it aint. Ripple otoh, way too early to say, but at least its not unthinkable.
thanks god bitcoin is not an alternative to fiat currencies. I wouldn't have bought into it.