It's generally pretty hard to short OTC stocks, so the idea that someone is out there short 10s of millions of shares is pretty far-fetched. And to what end? If the stock has gone down they're probably covering, not adding.
Roughly half of OTC stocks are themselves scams, run by crooks. Is the company funding itself by continuously selling shares? Check their SEC filings for ATM offerings.
If you genuinely think the fundamental value (not the share price!) of the company will be substantially higher than its current trading value, then go ahead and take advantage of the artificially low price, buy some, and be very patient and ignore the day-to-day stock price movements.
If you're in this stock because you've convinced yourself some short seller has overextended themselves and will get squeezed, well... Prepare to be disappointed.