I got out at 70c, kicking myself that I let 87c go, believing...

I got out at 70c, kicking myself that I let 87c go, believing that the price
was going to move way higher. With 20/20 hindsight, of course, I can
now see exactly how I should have played it, and with how much money.
But without a time machine to go back and execute the correct actions, this
information is useless. Perhaps someone can invent a graphene one, for
just this use? Mr. Derby? What do you say?