I haven’t been very technical lately, but I ran across this blog post from The unpublished notebooks of J. M. Korhonen.  Covers my sentiments on Blockchain / Cryptocurrencies exactly.  When I was asked I used to joke that bitcoin combines all the disadvantages of a credit card with all the disadvantages of cash.  A good short read:

My professional opinion as a blockchain researcher: I don’t see the point (yet)