As of now, bitcoin is just in its infancy period where everything is studied, everything is new, and it is not stable.Yes, it is true that everything will become obsolete in time but bitcoin? It is very early to judge because bitcoin is just toward the edge of its success. Many are patronizing bitcoin, many are asking how to have it. They think that bitcoin is one of the easiest way to have income. So there is no reason for the bitcoin to be obsolete.