Be what you want to be

In Dekaron SEA, you can 'specialize' in certain aspects of the game. You don't have to grind everyday.

You can PK other players (yes, there's an efficient way to do that, solo or in parties), challenge others in PVP duels (and beat players 10-15 levels higher than your character), grind efficiently for hours (it takes patience, skill, and techniques in luring, and some planning), blacksmith your items (upgrading your items is a mix of planning and gambling), or be a merchant/ businessman (buy and vend items for profit, or sell your services for dil, items, gems, and argates - the gem for upgrading items). Some players focus on honing their skills in leading a party to efficiently finish Instance Dungeons, which can be a game in itself.

You could also fish, an activity you can do AFK (away from keyboard) and which can bring you gems, argates, and fish which you can either sell or use in place of red and blue pots). You can haggle with vendors or offer items to trade, to bring down the price of items. In the course of playing Dekaron SEA, you might be all of them.