Yes, everyone can't afford to buy and hold 1 BTC at $100,000 or even at the current market price but there's no need to buy a whole 1 BTC in order to be profitable even small value of it will do like 0.5,0.4,0.1 BTC. Moreover, we have alternative coins which have the potential to be big just like BTC in the future.
if using this way, i think everyone can reach bitcoin. even the poor can own bitcoins. there is no compulsion to buy 1 bitcoin, and you can still be called a bitcoin user even if you only have 0.001 bitcoin in your wallet. they can buy or deposit their assets bit by bit into bitcoin as savings or investment.
I found the article quite interesting,
https://iai.tv/articles/the-rich-get-richer-the-poor-get-bitcoin-auid-1766maybe it is still included in this discussion. however, everyone can use bitcoin, even in some poor countries too many people use bitcoin as an investment tool.