with mobs drop gil in low level dungeon and people probably grind more dungeons in 2.1 I would say for a fresh lv50 who did most of his side quests and always pick up gil as requests' reward he should have around 300k. Then it all depends his spending behavoir. If he just get a normal and ask for free melding and gear up with myth/DL only he should get richer and richer. If he decides to pick up a DoL/DoH then he will get richer faster.