Abstract: We design and create HydroCoin to be the currency for the hydrogen age. It will ensure that future clean technology will be used with clean fuel only, without the need for the use of fossil energy. HydroCoin will be the first currency that enables the owners to decide what technologies will be supported by the community. When products appear from such technologies (i.e. gas, hydrogen, electricity etc.) the owners of HydroCoin will be able to buy energy-products from all supported technologies using HydroCoin as a currency. So this currency and its market price will reflect the current development-phase of clean energy, and the availability of clean fuel.