Financial market legend and 19th-century banker Nathan Rothschild once allegedly declared...
"The time to buy is when there's blood in the streets."
As the story goes, Rothschild used this contrarian approach to amass a fortune.
This is by far the best approach if you ask me. Buy when no one is willing to buy and there is a lot of FUD around the project. But this also comes with a lot of risk, so best is to not to put all the eggs in teh same basket.