Marietje Schaake, International Policy Director at Stanford's Cyber Policy Center, Eurasia Group senior advisor and former MEP, discusses trends in big tech, privacy protection and cyberspace:

Should Bitcoin enthusiasts be alarmed at its plunging value?

Well, I can only imagine it makes them a little less enthusiastic, although the value of Bitcoin is still a lot higher than it was a year ago. So I guess the level of concern much depends on when the enthusiasts started to invest in this volatile currency, which is also seeing more and more regulations coming its way. So if people choose to get out now, it further pushes down the value and so on. I'll be watching what happens next.