Lets say you had a time machine (DeLorean) and could go back in time.

 You had $1,000,000 cash and with 2:1 margin you would have a total of
$2,000,000 to invest.

 Now, lets say you SHORTED BSC for $153.95 totalling 12991 shares.

 You waited some time, and BOUGHT BACK the 12991 shares for $2.84 =
$36,897.28.

 After you return the $1,000,000 you got from margin, what was your
net profit for doing this short? -- not counting interest you paid for
it, or trade fees.

Here's something interesting:

Somebody actually bought 50,000 puts (k=$35) against BSC when it was
still trading at around $40 (OTM). I think the article said that the
puts were selling at $0.25.

Your investment cost: (Note: each put contract gives you the right to
sell 100 shares @ $35)
50,000 x 100 x 0.25 = $1,250,000

Your return if you exercise at...say your $2.84 quoted above:

(35-2.84) x 50,000 x 100 = $160,800,000

So you turned $1,250,000 into $160,800,000, and made $159,550,000 or
12764%. You gotta love leverage!

Long story short, if I went back in time, I wouldn't short sell BSC; I
would buy puts, and lots of 'em.