It is too late to short. Most brokers will not allow the opening of a short position below $5/share.
Put options will not work either since the lowest strike is $0.50 and the smallest increment for options are $0.01. The time premium would make it impossible to earn anything.
If, by some miracle it gets back to near $0.50/share, then it might be possible to get some put options with a reasonable about of time to go, before they go bankrupt; but I do not expect that to happen.
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