The role of Aion Kinah varies in different level

As kinah is the currency and lifeblood of Aion, many players are concerned with their amount of kinah from the moment they start playing. However, it is not advisable to worry about kinah during the beginning of the game after making a character.
In Aion, the amount of kinah which is actually needed at lower levels is trivial, as is the ability to get aion kinah from gaming activities. The first nine levels of Aion are about character development rather than equipment. Since it isn't necessary to spend kinah, it isn't necessary to get kinah.
Kinah does not play an important role in Aion until you are at about level nine and have become a 'Daeva', which grants access to the artisans in your capital city. Equipment, supplies, and tradeskills now become available and will be an important source of Kinah.
Of course, just as with money in the real world, you gotta have kinah to make kinah. (You will need a little kinah to get started before working with tradeskills and artisans.)