If bitcoin had experienced a stable price it would have been never be so popular as it is now, I'm also thinking this because people invested in the bitcoin because it was a easy profit maker
I think you are wrong because if bitcoin is stable on its price then it will become easier for other countries and stores to accept bitcoin as a payment because they will not be confused in putting a price on their products because bitcoin has a fixed value just like fiat and it has a lot of advantages rather than fiat so it will become more popular.