It will still be popular even if Bitcoin had a stable price. Most companies and retailers don't accept bitcoins today due to its price instability. They all would start accepting bitcoin as payment if its price would be stable.So, there will be a huge increase in demand for bitcoins which would increase its price and help the progress of bitcoin , but since bitcoin is a decentralized currency, its price changes way to often based on the increase and decrease of demand .
Bitcoin will be both popular and popular, but only in certain circles. As though I did not want it, but not all people can use crypto currency.
When the bitcoin is develped more, and the transaction fee is low, I will use it more.