On the other side we have people who have bought at a wrong price and now hoping that price would go up and holding and saying stuff like "bull is coming" and all that. Because, if the price keeps falling you know you did a big mistake by holding. Anytime you see a topic titled "bitcoin is going up" or "bitcoin is going down" you know what that persons situation is by just the title name.
Buying at the wrong price isn't really a problem as long as you haven't gone all in. It all comes down to wisely distributing your entry points, regardless of the sentiment. Even if you bought near the all time high last year, you for sure will have some money aside that you can put into the market to tank your break even point from $18,000'ish levels to $8000'ish levels, and the more you buy in at current levels the lower your average will be.
I honestly am past the stage where I feel sorry for people. If you don't utilize the current prices in your advantage you are just a sucker. On top that, if you think you'll reach a point at which you dump your coins in panic if the price reaches X level on the lower side, why wait? Sell right now.