even in the next 100 - 200 years, I don't think everyone in this world will have bitcoin, of course the reason is simple, not everyone is connected to the internet - not everyone likes bitcoin - not everyone understands bitcoin - not everyone can sell/buy bitcoins and many other reasons.

bitcoin is still very confusing for many people, especially with those who really love fiat money, they will definitely continue to say bitcoin is a scam blah blah blah. but there's no need to worry, even if bitcoin has groups that reject it, there will always be people who support and support bitcoin and that's what makes bitcoin stay strong.