The architects of a new blockchain exchange traded fund want to give investors the opportunity to buy into the technology, and are chasing a figure as ambitious as the technology itself: £1bn in assets.

Investors might raise eyebrows, however, at some of the stocks held within the fund. These include Rio Tinto, one of the world’s largest mining companies, and one small blockchain company that was recently under investigation by the Securities and Exchange Commission, the US regulator.