Digital cash yes, bitcoin no.
In a few years paper money will be die
i think you might be right, bitcoin is just an experiment right now and i think that it also might replace the dollar but it might be other cryptocurrency too
i hope that our financial system that we have right now will soon be replaced and we will have cryptocurrencies that will make our financial life way easier
Dollar cant disappear, there are a lot of people that will still using Dollar because they dont trust Bitcoin or they dont even know what Bitcoin is and that is also a reason.
There is a higher chance that Bitcoin will disappear than that it will replace Dollar.