According to this, we should pay more attention to digital currencies.

"Yves Mersch, Member of the Executive Board of the European Central Bank (ECB), has reported that digital currencies should not be ignored despite their relatively small impact on the economy."

"Yves Mersch admits that although virtual currencies do not have an impact on the general economy, they have the potential to do so in the future. He concludes that crypto-currencies cannot affect price stability or financial stability in Europe, but they may pose risks for users. User risk, he highlights, is more related to speculative investments and consumer protection, and not necessarily to payments."