As long as there's a chance the stock trades pink again, it's never worthless. The same reason the shorts want to cover ( there's a chance the company pops up under a different ticker that they have no idea they own and suddenly they are down), some one else might take a risk that they buy a company at 850k market cap and it pops back up as ticker xxx and second ticker sannabis worth combined 8m mktcap.
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