Just FYI crypto-currency is not the global currency of the future so I partially agree with this post.
Nevertheless I still like Bitcoin et al. But McAfee's manparts are in serious trouble.
What I cannot agree with is that the intrinsic value is zero. The ability to instantly send money digitally at the push of a button in an electronic era has the potential to make a serious dent in the financial industry with several trillions at stake. But only the righteous will thrive.