When Google announced that bitcoin traders would be allowed to buy advertising space on its pages from August, central banks were alerted to the next likely surge in publicity for cryptocurrencies.
The increasing activity around digital currencies has not gone unnoticed at the Bank of England, and on 7 June Threadneedle Streetâs brightest will publish a consultation document, setting out how a publicly operated electronic coinage system â one that would rival bitcoin â might work.
The report is a staging post in the bankâs work on digital currencies, and will also assess the prospects for so-called stable coins, ones whose value is pegged to something that already has a value.
Bitcoin is many things, but a stable coin it is not, according to Brian Davidson, economist at Fathom Consulting. Bitcoin fails the three main tests of a currency â that it is a store of value, that it qualifies as a unit of exchange and that it is a unit of account.
Its supporters say the rocketing value of bitcoin â from below Â£2,000 four years ago to Â£45,000 in April â shows it is a store of value but, says Davidson, by the same measure it could also be worthless one day. And its volatility â bitcoinâs value has slumped 40% to about Â£26,000 since that April high â means holidaymakers wouldnât know from one day to the next how much they had to spend.
However, the idea of a publicly formulated and operated digital currency, backed by the Bank of England and, ultimately, the British government, runs against all the tenets of a digital currency like bitcoin, which operates outside banking regulations.
Bitcoin allows payments to be sent between individualsâ digital wallets without anyone else knowing they happened, which is why it has been called a money-launderersâ paradise.
Larry Summers, former economic adviser to Bill Clinton, has criticised the US Federal Reserve for its apparent lack of concern about the rise of digital currencies.
This criticism could not be levelled at Sir Jon Cunliffe, the Bankâs deputy governor for financial stability, who has given several speeches on the subject and said last month that it was âprobableâ that the state would need to issue some form of digital cash to retain the publicâs trust in money.
âThe knowledge that under stress depositors have the option to switch into state money may be important in preventing a more general loss of confidence in money,â Cunliffe said. That presumes digital currencies will become big business and millions of people who opt to store money in an electronic wallet and pay for a service with it â only to become disillusioned when the service is not provided â deserve a back-up option.
Cunliffe is part of a taskforce examining the benefits and challenges of digital currencies and he will also present the findings of a consultation that asked how much people wanted it and why.
The banking industry will be interested to hear how the current form of digital money â used by most of us for payments from our phones, computers and debit cards â should be scrapped in favour of one that, while it looks modern, will, once surrounded by protections and regulations, operate much like money. Summers was an early enthusiast, but now says cryptocurrencies could be something akin to gold â kept to one side of mainstream money transfers.
âGold has been a primary asset of that kind for a long time,â he said. âMy guess is that crypto is probably here to stay as a kind of digital gold.â
Maybe that would suit the Bank of England just fine.