Americans would still regard the dollar as king, although cryptocurrencies are increasingly looking like the heir apparent in the world of finance.

Prior to the election, Donald Trump said he would be 'the first crypto President', and his enthusiasm for digital currencies extended to the release this week of a crypto coin to mark his return to high office.

The likes of Bitcoin or Ethereum are not yet currencies for buying a coffee or groceries, but they are fast emerging as a legitimate asset class.