Ether (ETH) is the currency that is used on the Ethereum blockchain to initiate transactions. Async runs on the Ethereum blockchain and so users will need ETH for three primary reasons:
To mint artwork. Minting your artwork requires you to initiate a request to do so. Since blockchain technology is decentralized, your request requires a “gas fee” or a vehicle to transport and fulfill your request. Gas fees move on a sliding scale depending on how busy the network is (how many people are using it).
To buy artwork. Async Art uses ETH as currency to purchase artworks on its platform. In order to buy an artwork, you must have ETH in your wallet.
To change Layers of an Async artwork. As a Layer owner, it will cost a gas fee in order to change the state of your Layer.