Alex de Vries has been a blockchain specialist at PwC?s Experience Center since 2015. He earned his MSc in Economics and Business from the Erasmus University Rotterdam in 2011. In 2014, he founded the blog Digiconomist.net. This blog is a platform that provides in-depth analyses, opinions, and discussions with regard to Bitcoin and other cryptocurrencies. The blog also features the Bitcoin Energy Consumption Index since late 2016, which has played a major role in the global discussion regarding the sustainability of proof-of-work-based blockchains.