To make any money long you will have to hold until $6
To get the instantaneous pop to $12 hehe. Do you want that pain. You won't be able to buy it after the news so you have to keep buying as it goes lower and lower to $6, until one morning you find out it is $12 and you go ahhhhhh.
If that happens. Until then it is straight down. Slow but down.
When a buy out offer is announced the SP will already be at that bid so to speak, so to anticipate th9is "pay off" you must buy Blackberry shares now and or all the way down to $6 as this is going to keep going down and down and down as large players dump.
At which point you might be unlucky enough to have bought all the way down to $6 and then get a pop to $12 out of the blue. There will be no anticipatory movement it will just happen. Do you want that pain!?