So the answer should really be both yes and no.
I am also thinking about that. What if the price stays. Where will this people (including me) would go? Will they stay and let their bitcoins be in an account or just trade it for fiat and live happily ever after?
Im very we will still continue since we know where we can get some other source to get bitcoin and surely the trading of bitcoin will stop because the price is stable what will be the trade happen if that really occurs? And for the traders surely they would stop and seek another alt because they cannot get some profit if price of bitcoin would be stable.