Do you think if BTC had a stable price which could only be altered by $0.01-0.10 it would still be as popular and as used?
I think its a big NO.
Bitcoins price of high and low is what makes bitcoins popularity now. Most of all when its price is just pumping and pumping that every investors loved to see.
Yes agree, the most interesting thing from bitcoin is bringing a new idea of decentralization, when the price is stable it will be difficult to compete with various payment systems like Paypal which is already very strong.