Is it Kinah or Kina in Aion 2?

The global Aion 2 client spells it Kina; most searches use the spelling Kinah.

What is the difference between Kina and Quna?

Kina is the in-game currency, with a separate Kina (Bound) form that some content does not accept. Quna is the premium currency. The Quna Exchange, a membership benefit, connects them: Kina Chests made through Substance Morph sell for Quna.

How many trades can you do a day?

With membership, five Personal Trades a day, resetting at 00:00, and up to 10 Market listings at a time — both per the game's membership guide.

Should you buy Aion 2 Kinah?

Buying currency from third-party sellers breaches NCSOFT's terms of service and risks the account. The Quna Exchange is the in-game route between the two currencies.

Aion 2 currency: Kina and Quna

The global client spells it Kina (most players search "Kinah"). It comes in two forms: Kina (Bound), used throughout Atreia but unavailable in some content, and tradeable Kina, used in the Market and for Kina Chests made through Substance Morph. Quna is the premium currency. The game's membership guide lists the Market, Personal Trade and the Quna Exchange (selling Kina Chests for Quna) as membership benefits.

The currencies, in the game's words

Kina (Bound)	Currency used throughout Atreia, but unavailable in certain content
Kina	Currency used in the Market and Kina Chest (Substance Morph)
Quna	Premium currency; Quna bought with money has a 72-hour pending period before use

Membership: what the game says it unlocks

The client's membership benefit guide is where the Market, Personal Trade and Quna Exchange are described, and Personal Trade needs both players to have it available. NCSOFT's launch FAQ describes Aion 2 as free to play with an optional membership.

Market (membership)

Buy listed items, or sell by registering them at the Market.
Up to 10 items can be registered for sale at the same time.
Payment is distributed when the sale completes.
The Market unlocks at level 45.

Personal Trade (membership)

Exchange items directly with another character.
Up to 5 Personal Trades a day, resetting daily at 00:00.
Both players must have Personal Trade available, and both confirm the contents.

Quna Exchange (membership)

Kina Chests can be sold in exchange for Quna.
Register Kina Chests made via Substance Morph, or buy other players' Kina Chests with Quna.
Up to 10 sales registrations can be posted.

A warning worth reading

Most pages ranking for Kinah are gold-selling sites, and buying currency violates the terms of service of every NCSOFT game. We do not link to those sellers and we do not take their advertising. The exchange rates and farming numbers they publish are also, as a rule, unverifiable.

Frequently asked

Is it Kinah or Kina in Aion 2?: The global Aion 2 client spells it Kina; most searches use the spelling Kinah.
What is the difference between Kina and Quna?: Kina is the in-game currency, with a separate Kina (Bound) form that some content does not accept. Quna is the premium currency. The Quna Exchange, a membership benefit, connects them: Kina Chests made through Substance Morph sell for Quna.
How many trades can you do a day?: With membership, five Personal Trades a day, resetting at 00:00, and up to 10 Market listings at a time — both per the game's membership guide.
Should you buy Aion 2 Kinah?: Buying currency from third-party sellers breaches NCSOFT's terms of service and risks the account. The Quna Exchange is the in-game route between the two currencies.

From the AION 2 global client: the currency descriptions and the Market, Personal Trade and Quna Exchange text (from the in-game membership benefit guide) are the game's own, and the Market unlock level is from its content-unlock table.