Probably less than 1% of the world's population has any BTC, so it is very misleading when people try to act like bitcoin is anything even close to approaching a mature asset class.
Of course. Not everyone knows about BTC. Even though institutions have joined the game, they only constitute a small fraction of the world's population. There are many countries without Internet access and/or reliable access to electricity. How can people living in such countries use BTC that way? For adoption to increase, there needs to be the proper infrastructure to make it happen.
I think we're still early to the game. Set yourself forward 10 - 20 years, and Bitcoin will already be known to almost everyone in the world. Once that's done, nothing should stop BTC from surpassing Gold's market cap. At least, that's what I think.

Bitcoin adoption is quite low even if we were to eliminate the countries (locations) that are lacking electricity and/or lacking internet services (or cell phone services that would allow for connection to the internet.. even if the data might be limited). I was not attempting to suggest that infrastructure is keeping back bitcoin adoption as much as even awareness or hearing the bitcoin name or people thinking they know what is bitcoin, they likely don't really know very much about what bitcoin is, even if they had heard the name and they might speculate that they know what is bitcoin.
Taking whatever factors of bitcoin exposure, bitcoin adoption remains quite low whether we are talking about individuals or institutions and/or even governments. Many institutions and governments are not lacking information service (such as internet), so bitcoin remains quite immature, even if more and more folks are hearing about bitcoin ETFs, and even the bitcoin ETFs are still not very widely available, even though they have been quite successful in terms of some folks buying bitcoin price exposure through such instruments, but still many RIA (registered investment advisors) are barely coming into having BTC spot price ETFs available for them to offer to their clients... not that ETFs are real bitcoin, even if there may be some requirements that the underlying managers of the ETFs are supposed to be backing the BTC with actual bitcoin (which I am not completely sure about the various terms of how matched the ETF shares have to be matched with actual bitcoin).