Its okay because not everyone is as confident in their decision making skills as you may be. Everyone has a different goal so we need to respect that. Those who wish to hold, should continue and those who want to sell, should do as they please.
If they are not confident, they should not decide to invest in bitcoin because before they decide to invest in bitcoin, they should have researched more information about what the benefits of bitcoin are for them. If they only follow what others suggest and don't look for other information, it can cause them to be insecure and panic if something bad like a price drop occurs. But those who already understand the risks of investing in bitcoin will not panic and can keep holding their bitcoins because they know that the price will increase again.