Guardian:
Spread-betting firm?s profits surge on bitcoin boom
4 January 2018
Tom Kirchmaier, professor of finance at the London School of Economics, said the risks of a bitcoin crash could be amplified for CFD speculators. “Just stay out of it,” he said, adding that bitcoin was a “bubble with exponential growth, and one day there will be an explosive decline – it is much more dangerous [trading in CFDs]”.