Sooner or later people will realize how hard they can own 1 Bitcoin. In about 12 more years, 3 more halvings, I think we will see how people knew about Bitcoin in 2020, 2021 but still hesitated to invest in, feel deeply regret about their mistake by ignoring Bitcoin.
For many, Bitcoin was too expensive even when it cost ten times less, and today 1 BTC is for most people something they can only dream of - while on the other hand, someone can buy thousands of BTC without any problems. Of course, there is always the possibility of buying smaller amounts, but it's hard for people to accept that they can't just have 1 whole BTC - and that even with an investment strategy of say $1000 a month, it takes 4 years to achieve it - assuming the price stays as it is now.
Regret makes no sense, because crying over spilled milk is just a waste of time. While people are waiting for some right moment, time and numbers are ruthlessly beating them day by day.