Assuming you're not a time-traveller or that you can predict the future, it makes sense that there's a binary outcome and you should be open to the best and the worst case scenarios, right?

But by its very nature, the 'best' doesn’t need your attention (in fact, by meddling you could impede the optimal outcome).

Mentally and financially it makes sense to prepare for the worst case, and carry on enjoying your life in the meantime.

This may sound a little 'glass half empty' but if you think about it, you've cut out 50% of the work of future-proofing.