I don’t know. Not talking about insider trading or anything illegal, but… you may know something about that particular company and its business that puts you way ahead of most other market participants in their appreciation of the stock, which‘ll set you up for outsized gains on the stock (or also known as doin‘ a Bojack on this forum).
The overall market is very unlikely to double or triple in a short period of time. A single stock though? Quite possibly. Doesn’t seem a bad bet to me, if you’re willing to take that risk.
You will likely not have that insight for 10 or 20 stocks at once.