I started off with 2, upped to 20 and today added 10 more so I have 30. That's it now. It's all my savings! In the last 10 days I've gone from £800 profit to £1000 loss! It's so volatile at the moment which makes it quite exciting - as long as a) I don't need to sell quickly and b) I only have 30 shares. Some of the guys on that fb investors group have hundreds of thousands of dollars worth. They must have nerves of steel.
I reckon I'm in it for 12-18 months, so weeks like this one when it drops don't matter too much because it will rise again.
One guy on that group posts his predictions every now and then. He looks at all the details like what products they'll bring to market, which countries have placed orders, what they're worth in profit to Novavax, how that will equate to share price etc. It's really interesting. He reckons they'll be over $1500 a share next year!
Then you get others saying OMG, they'll be $300 a share after approval!
As long as it's somewhere in between, I'll be happy!