Don't be too surprised.

In 2017 when bitcoin was going up, a lot of people were overly bullish over it regardless if they know what bitcoin is for in the first place or not. And when bitcoin was in a downtrend, a lot of them called it a scam, or a failed project. Why? The human emotion is a wonderful wonderful thing. It's pretty much similar to the stock market too! When a company's stock is growing in price, it's easy for people to assume that it's going to be successful. But when it's falling? "Meh, that company sucks anyway".