I think there is no need to wait for investing in Bitcoin. Because I myself bought Bitcoin when it was 25,000 and sold it at 40, thinking that this might be the highest price. If I lower it a little, I will buy it again. I kept waiting, but even after lowering it a little, the price kept increasing. I thought and waited a little longer, and after thinking, it reached 100, then I decided that there was no point in thinking anymore, I will buy Bitcoin with a part of my salary every month, so I started buying. Now I realize that I was wrong to wait. I think Bitcoin is an asset that may go beyond our reach in the future. So now is the right time to invest.
I will not blame you for selling your Bitcoin too early because you are responsible for your actions and you never believed that Bitcoin could one day get to six digits or you never saw Bitcoin as an asset that will keep increasing in price in the future. I am happy you have seen what Bitcoin can achieve and you have motivated yourself to invest in Bitcoin again, and I believe you will never want to sell your Bitcoin for peanuts again. Bitcoin is an asset that increases as time goes on, so waiting for Bitcoin to drop to your set price is not an investor mindset, and since you are no coiner, that mindset will only delay in accumulating Bitcoin. It is better you change your mind and start accumulating bitcoin monthly because you will wait for eternity; bitcoin will never drop to your set price, and you will eventually miss out on investing in bitcoin.
I will not blame the dude too because it is possible that the dude invested what he or she can not afford to let go at that point in time or may be because of little profit. So many investor sold their Bitcoin very early because of reasons best known to them but anyone who invested what they can afford to let go is not suppose to even have the thought of selling their Bitcoin since they have other things that they can use to sustain themselves and allow there investment to grow. A no coiner should strive to have a portfolio first and then look forward on growing it because they won't regret this decision in years to come.