It's $100 worth of stock. Personally, I'd hold on and hope for a miracle. The odds are way against it, but if it goes out of business, having lost $20 instead of $110 isn't going to mean much, however, if it gets up at $.001, making $900 instead of $550 might. Even more so if it got above that price.
Presumably you bought it originally knowing it was poor odds, but a large payoff if successful.
TA - Over $500 million in toxic funded pump and dumps exposed and growing every day!