There will be coins more used than bitcoin even now there is but i don't think any other will beat its market cap. Bitcoin is an asset, like a gold. So it will always be the most valued coin on the market.
I agree with you, there will be coins that will be used more often than bitcoin, which will be used in more areas, but the popularity and status of bitcoin are unshakable, bitcoin is a cryptocurrency in the minds of people, synonyms