From the print version of the DT Business Section:-
Bitcoin an environmental disaster with no real worth, warns 'bank of central bankers'.
Quote:
Crypto currencies "are not backed by the assets and revenues stream of an established state. Most can be rendered worthless by fraud or digital manipulation. They are essentially Ponzi schemes that masquerade as citizen currencies beyond government control."
Oh. Right. And just how well are those government controlled currencies doing then? £100 in 1945 buys what £4101 does in 2017 (https://www.officialdata.org/1945-GBP-in-2017).