carbon forks are fine. just check it for cracks now and then and ride the hell out of it.
I have a carbon fork with 10,000 miles on it and it is fine. let me tell
you about how many potholes, cobblestones, rocks, and cracks it has seen.
thing is still mint
as with anything, if the fork was built incorrectly, or cured incorectly, or junk
to begin with, then yes it might break. or if you got the lightest ultra-thin single-use
fork, you may want to inspect it every damn ride.
10 years ago, I would worry about carbon. today, nearly all CF bike parts are dead solid
and ultra reliable. even the low-end factories know how to make them properly nowadays.
mfg co's have their stuff together