No offense, but I bet even if you had a chance to know about bitcoin in 2009 or 2012. You will never pay attention to it and even like many others, will consider it a scam not worth bothering with. It's not just you, we all have the same thought.
Be honest, we just feel regret because everything is so clear now and what bitcoin has achieved. But if we had the chance to go back in time and forget everything in the present. Again, we will also reject bitcoin.
Humans are inherently timid when things are unclear, but become very greedy when things are clear and certain.
I agree, and also, OP is able to say these things because of the current price of Bitcoin already right now. It's kinda because of how it's already expensive now. It's just like a lost opportunity.
If Bitcoin is not at its current price right now, you can't see people saying this.
Just my 2 cents, it's never too late to buy bitcoin always.