That was a surprisingly sensational interpretation by Reuters of the original quote. Looking at the source, he didn't recommend these assets. What was actually wrote was:

"At some point investors — leery and indeed weary of receiving negative or near zero returns on their money, may at the margin desert the standard financial complex, for higher returning or better yet, less risky alternatives. Bitcoin and privately agreed upon block chain technologies amongst a small set of global banks, are just a few examples of attempts to stabilize the value of their current assets in future purchasing power terms. Gold would be another example — historic relic that it is. In any case, the current system is beginning to be challenged"