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Arcblock (ABT) token is currently based on cryptocurrency Ethereum protocol. It is a pre-mined utility token used to pay expenses within the ArcBlock ecosystem. At the moment, ABT is listed on a number of exchanges with the possibility to trade it against fiat (KRW on the Bithumb exchange).
Paypex (PAYX) is based Ethereum protocol. Mercatox remains the only exchange platform, where the token is listed now (PAYX/BTC and PAYX/ETH pairs).
sUSD (SUSD) is a cryptocurrency and operates on the Ethereum platform.