Coinmarketcap has something called "fear/greed index" which basically shows this as well. This is why I love that, it basically shows you when to buy and when to sell technically speaking. I am not saying that its the only way, its not a "real" indicator, its not like BB or EMA or anything like that, its just a straight up fun little thing. However, if you ever check it, you will see that when the fear is at the max, it always goes up, and when the greed is at max, it always goes down, except a very few rare occasions. This is why I think its quite important to realize that we are going to end up with a little bit more going up soon enough.