Is there a scenario where bitcoin remains niche for a very long time?

I have a lot conviction on bitcoin and never sold any bitcoin. I continue to buy whenever I have extra funds.

However, I've been having doubts about the conviction. I am wondering if bitcoin is truly broadly adoptable. Most of the people are aware of bitcoin but people who understand and self custody are very very very few. Maybe the adoption will take several hundred years? maybe it will remain a niche in our life time and it is risky to put high percentage of net worth in it.

What do you guys think?