You are missing the expression, which is the best time to buy was yesterday, and the second best time is today..
Yeah I thought of it too but I choose to write it that way because I believe yesterday is a past which can't be reversed so all chance given by yesterday are gone.
However, today offers a new chance for who are willing to take it and which might be better than tomorrow because no one can predict tomorrow, I had to cut out yesterday and replace it with today as today will later becomes a tomorrow
You are seeing it from the angle of motivational speakers instead of facing reality. The statement is not supposed to be difficult to understand neither does it mean you have to dwell in regrets for not buying yesterday. Rather it is simply saying that the more you delay buying Bitcoin, the less the opportunity of getting it at lower price is. Some people got Bitcoin when it was below $1k, some got it when it was below $10k, those are the people who bought yesterday which was the best time to buy. Now we have the chance of getting it below $100k, the second best time to buy so the question is are you buying now or waiting to buy at post $100k? It will surely get to that price in a matter of time so we have to use the opportunity we have now wisely.
So those that haven't invested in bitcoin is not late to hop in and start accumulating. Just as @moreno233 said now we have the chance of getting it below $100k, just like those who where opportune to buy bitcoin below $10k or below $1k . And sir @JayJuanGee mentioned something in one his previous reply, saying now is still an early stage in investing in bitcoin. Which addup in my inspiration to bordly accumulate more quantities of bitcoin this time around till I hit my bitcoin accumulation goal (in long-term investment). Because soon enough you would no longer see bitcoin around the price range of $30k or even $50k+ . Same as you can never see bitcoin around $1k or $10k again May be by that time bitcoin would be ranging from $100k+ and above. So stop delaying and start accumulating, though it won't be a easy ride because during the journey of accumulating they would be decreased and increase in price that you would need good principles to be able to hold on and don't worry this forum and the thread would help you with that.