I need money, whats a profitable trade?
 

Title says it all.

the trade of an adventurer

Jewelcrafting is OK if you're an enchanter. Smithing to make banded armor is alright at low levels. The best way to make money, though, is to get to a high level and either farm or power level.

best profit trade is patience.

Mage, druid, necro and shaman are all pretty easy to solo with classes, and with each them of them around level 30 you can farm up quite a bit of money. A lot of players including myself leveled/farmed the Misty Thicket guards, great exp and 10pp per kill from the spears they drop. I know 2 players who have farmed up to like 30k from those guards.

Buy low sell high in EC, start a casino with Vegas odds once you get 5k.

Major in engineering.