Necessity is the mother of inventions.  Issue raised by you ; I do not object to that.  You have given links favuring your arguments.  But still it can not be an end to an era.   

I am also of the view that nothing is permanent in this Universe.  Even big stars which are thousands times bigger than earth have to die one  day.   So Bitcoin is very minor thing as compared to those stars.

But still I am of the view that there will be certain inventions resolving the problems mentioned by you or some better alternative will be invented.