FOFB (Fund of Fund BlockBank) is the first fund-of-funds-type digital currency investment system based on blockchain technology. The endogenous value transfer token of FOFchain supporting the ecosystem is FOFbit (abbreviation: FOFB). The risk of holding a single digital asset is extremely high. If you replace a single digital asset with FOFBit, the market value will be integrated into the sum of high-quality assets of the fund of funds, and you can easily upgrade to holding a FOF asset portfolio. When the assets are redeemed, the total market value of the corresponding proportion of the asset reserves of the parent fund on the chain is automatically obtained, and it is automatically converted into any digital asset for extraction.