I changed my wire every few years before. Last year I went to the 250lb Power Pro and have yet to experience similar issues. The first 15-20ft would pop a strand and I'd just cut off that section; depending on how many lines from lost crab pots encountered. No such problem with the newer generation braid.
I've hauled up to four pots at a time towards shallow water. I couldn't crank them up with my manual 'riggers, just used the thrust of my kicker to drag 'em up towards the beach. If the bouys are not to compressed to read the contact information I'll attempt to contact the owners.
Anyway, no matter what type of cable used, just keep an eye out for frays. Cut off that section, once it starts to wear.