I often wonder if 15 years is a long time or too short for people to accept something - but I can't help but feel that people simply aren't interested in BTC, not even from a profit perspective, let alone from a technological aspect. If we look at the global percentage, it is still below 5%, which is simply incomprehensibly low considering that BTC has entered the mainstream since 2017, and it turns out that since then, that percentage has increased by maybe about 2%.
Fifteen years is an eye blink in the grand scheme of things.
Let’s face it: Bitcoin is difficult to understand and aims to replace gold, at minimum.
Gold took probably a few thousand years to be understood and served as a good store of value for a few thousand years thereafter. We cannot expect Bitcoin to evolve so quickly. It will take time to embrace this paradigm shift.