Buy when there is blood on the street!!! But this is only for people with balls of steel.
I see an opportunity here!
If this thing keeps going down, I'll engage the buying gear. The rights issue might not work and I'll be left holding "cheap" undiluted shares [read value!]. Or the rights issue succeeds with almost all the rights are taken up by the government and KLM and there will be no "additional shares" available for sale even after the rights been credited because these two are not [day] traders. Or I buy and burn my fingers terribly.
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.