In 2007, I bought DNDN at $2 and sold it soon after at $4. Then, I discovered NVAX and been with it since then. Although I doubled my money with DNDN in no time, I learnt my lesson never to gamble with stocks. I decided to do extensive DD before putting one penny in a stock, no matter what guru recommends it. This is why I've been only with NVAX since then.
NVAX has never been a gamble to me, and never will be, despite being heavily manipulated.