There's HUGE risk shorting pennies. If you're short 10,000,000 at .0002 ($2,000), and it spikes to .0010, you owe $10,000.
Plus, your broker requires $2.50 per share in a margin account to protect the broker.... so don't forget to deposit $25 Million in your account first, all so you have a chance for a $1,000 profit.
Shorting pennies looks good at first glance on paper, but not so good in reality.