For me, payment will be one of the biggest use cases for BTC beyond just holding it. If bitcoin can become more easier and less expensive to use for our everyday transactions, most especially across borders, it will make more sense. The thought of using your BTC without giving up custody is also interesting.
Its always being the original intention for the currency and until it reverts back to be a utility coin as intended, we cant confidently say that Bitcoin has gone mainstream or attained global adoption.
A conflicting thought in having though,
Is Bitcoin ever hyped?
I get the part where people speculated the price of one Bitcoin to range into $millions even while we are just above $126k for ATH and the price today still struggles around $83k but then, its not really hyped.
What happens is, people tend to rush in when the bull seasons is on for short profit making and get out when the market goes bearish and as much as this isnt what we intend to be seeing, it also helps in its publicity but, might project a negative connotation when these individuals end up downplayed by market movements.