CXP Conversion - I won't do. To get a 100 Fleet Marks in converting 10,000 CXP, which takes months to get back. So I would spend all my CXP on one single Fleet Project and have to wait another month to do again.
You're working from the position that this CXP has any other value or use. It does not. In fact, if you do NOT convert it, you will eventually hit the cap of how much you can hoard and any extra will be wasted. There is really no use in hoarding it past 110K.