Well the fragment isn't as bad as the trophy. The fragment is just winning stuff regardless of how much you spend, so you can just throw money at the problem and it'll go away. The trophy actually requires you to profit from it, and it needs to be done in one single serendipidy visit.

In either case, I don't think I'll touch the game again now. Not in a very long time, if ever. Maybe I should platinum FF13 too.