Decentraland (MANA) is currently based on cryptocurrency Ethereum protocol. You can trade this digital asset on the fair number of exchanges. For example, Binance features MANA/BTC currency pair.
Credits (CS) cryptocurrency was launched in 2018. Being originally based on cryptocurrency Ethereum protocol, this cryptocurrency underwent a swap to the native mainnet. As a result, there are two assets are functioning at the same time: ERC20 CS token and CS coin. Credits token can be purchased in the number of exchanges for cryptos and is available with various wallet applications.
DEW (DEW) abbreviation stands for “Decentralized Exchange of the World”. Therefore, DEW token is the native token of this exchange platform. It is based on the Ethereum protocol. You can buy DEW for crypto (for example, BTC or ETC) on the number of exchanges.