The sequence of the numbers is not important and it’s not all or nothing (5 correct numbers would still net a decent amount of money), so there’s a chance that I’d recall enough to make use of it anyway. But it’s a good point, this kind of thing hinges on the specifics of how the sentence is transmitted much more than something like “take out fire insurance” or “don’t trust X”.

…receives message whilst scuba diving…spits out regulator in frustration…drowns. Never gets to send message from the future so doesn’t drown.

Timeline broken, existence ends except for an endless five-year loop.

Woops!