From the article 2018 saw an increase of 300 million tonnes of oil equivalent of primary global energy demand.

Which is[1] equal to 3489 TWh.

Taking the worst case from one of the most inaccurate reports about bitcoin's estimated power consumption (which is also the highest estimate I've found) is 61.4 TWh annually.

So the total power consumption of bitcoin seems to be the ~1.7% of 2018's total increase on the global power demand.

Take it with a grain of salt, I most probably I have something wrong.

[1]: https://www.unitjuggler.com/convert-energy-from-toe-to-MWh.h...

The estimates I’ve seen for bitcoin energy usage puts it at 1% world energy usage. That’s a lot of power, enough to run a country like Ireland, but it’s not enough to explain the jump in the chart.