I suggest keeping the negatives, but in a separate place to the prints. Then, if a print gets lost or damaged (e.g. if a burst pipe means that some of your treasured prints get soaked, as happened to me) you've still got the negatives as a backup.
PC experts are always telling us to keep backups of everything. If we're doing it for digital data it would seem wisest to do the same for 'old technology'. (After all, a shoe box full of negatives doesn't take up much space, does it?).
Chris