Maybe because of it's unstable exchange rate 
nope. it will not make people stop. before people joined surely he would have been aware of this risk. fluctuations will not make people stop using bitcoin My mother, hell my whole family sees bitcoin and cryptocurrency as a gambling operation. They see it as no better than throwing craps on a table in vegas. I think for the most part it's not the instability of bitcoin prices that scare people from using it, but that it's the fear that investing your real money can be sucked away by schemes so quick you don't know what hit you.