Aye, fishing isn't the most efficient money maker. But thats not the point of fishing. The redeeming quality is the amount of effort you put in per gp earned. As a previous poster stated you can literally read a book or watch a movie while your character grinds monks/sharks. Sure you can say the same about merchanting but there's always the chance you lose money. With the removal of river trolls you have 0% chance of losing anything while fishing. To the OP, at level 69 you should move to monkfish and also multitask! No point just staring at the screen waiting for the fish to come in when you could at least be browsing the forums. Trust me makes the time go much faster.