Just buy BTC and close your eyes. Don't look at charts, price predictions and etc. The history shows that BTC is always growing in long-term, so you will earn money! Don't panic, don't sell when everybody does and you will be on the top!
First things first, don't panic.
Overall this is what I'm going to say but you just said it. Apply also the principle that Warren Buffett is doing about greed and fear.
Never feel hopeless , be patient and everything will be fine soon.
They feel that its the end of bitcoin whenever they see it starts to fall.
But they never think that corrections aren't going to last a lifetime and uptrend will be its opposite move.