It's a bit fun reading the topics and the panic people have when bitcoin was less than $1000. I believe most of us have once said "if I could back to 2009 I would have bought bitcoins" you know the choice between red and blue pill? where the blue can take you years back with all the knowledge you have now versus to the instant million dollar pill. So I console myself, even if bitcoin is around $6000 now, that this could be cheap price still years from now..
You are right. We can't really predict the future of bitcoin's value but with as the difficulty of mining bitcoins increases then its value will increase as well. So few years from now or a decade from now, the price that we see today would potentially be doubled or even be more than that. So let's stop being an emotional investor and try to take advantage of this moment for we might not be able to purchase this specific price of bitcoin in the following years.