Stop promoting Blockchain, Bitcoin and other Cryptocoins. You're killing us.
Most business "blockchain" is not in fact the full Bitcoin-style blockchain, with proof-of-work and trustless competition and a currency - the term is getting applied to simple append-only transaction ledgers with hashes for tamper-proofing. This is, of course, excellent stuff! Geeks know it as git. And we had it in 2005, four years before Bitcoin. What's good is not new and what's new turns out not to be any good.
Things to make you go, "hmmm?"
The Bitcoin Singularity is approaching:
The amount of electricity consumed by Bitcoin mining is already huge, but is still rising fast. In a 30-day period from past October to November, it increased by just under 30%. At this rate (and assuming no new energy-generating capacity is added), Bitcoin mining will require all the electricity produced in the U.S. by July 2019, and all the electricity produced in the entire world by February 2020.