I have a circle pacific flight booked that I might not be able to take. I'd like to use it sometime in the future.

If I understand correctly, canceling will cost me 10%. Can I just put it on hold or otherwise suspend it? Do I have to rebook to another date as a placeholder, then rebook again when I know when I can go? Would each of these cost me $150?

Is there a limit how far in the future I can push this?

It's booked at the old price, by the way.