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O3 Wallet is founded in Tokyo in 2017, it is one of the earliest crypto wallet development teams in the world. O3 Wallet focuses on providing professional crypto asset management tools and services. O3 wallet is compatible with multi-chain ecosystem, with 100000 + users around the world. It supports Neo, Ontology, Ethereum and BTC as well as support mobile and chrome extension. Users can use credit cards (US dollar) to purchase digital assets.