The answer is very simple, more stable means more popular and that is the general rule, we need to achieve that level if we want to attract more users of bitcoins and to generate massive adoption.
Amen to that!
I would say that being stable price of having a range and not literally a stable price of bitcoin and doesn't move at all.
For example, the price of bitcoin is stable at the range $800-$900.
I think that's more reasonable for being popular.