Yes greed is the main issue, reading your topic I thought you have a solution to the problem but now you are asking the audience about what they think? Hmh, the truth is everyone can't always be at profit, some will always buy at ATH thinking that the price is rise more, I started hesitating to buy bitcoin after 25k but it goes up to 47k, I never expected that
If you have sold your crypto at your desired point then be happy always, even if the price continue to grow. We shouldn't flow with greed. Investor can enter in the crypto market anytime if they have plan for holdin long term. They need to choose top coins of crypto market for this. Bitcoin is the safest home for investors in long term. Recently btc price have reached up to 42k, maybe you have a typing mistake.
’Buy at low and sell at high’ is the simple way to ensure profit from investment. It doesn't mean that you need to buy at dip and sell at top for taking profits. Don't look at the price much if it falls after your purchase. Just wait with patience.