There will be a time when cash will lose its existence, the advantages that Bitcoin has are increasingly attracting people around the world. Bitcoin can be used as a medium to transfer value from one point to any point around the world without going through a third party, for this reason Bitcoin has the potential to become an alternative medium for transactions or the role of cash will soon be replaced.
Even though there are still many countries that have not made Bitcoin a means of payment, technological developments are inevitable. Currently cash still plays an important role as a transaction tool, but we must be more active in educating our families and relatives to use non-cash transactions before cash disappears from the surface of the earth.
Robert Reich once said this
There will be a time (I dont know when), I cant give you a date when physical money is just going to cease to exist.
My assumption is that sooner or later cash will disappear from circulation because nothing can fight technological developments.