Jack: too late!!! It's not possible to put the "blockchain" genie back into the bottle - fact is that distributed ledgers are here to stay (in virtually every industry that relies on keeping records of some kind). The old, outdated paradigm of a single central registry of information as the sole authority for recording transactions (be they in banking, voting, library lending, customs freight, food safety etc) is fast becoming a thing of the past.
The link in your post points to cryptocurrency cyber attack, but these same attacks have plagued the traditional banking industry for years - and I suspect that the financial losses in the banking industry from cyber theft have been far in excess of the Conrail incident.
Every market regardless of its nature is driven by fear and greed and the 10% fail in Bitcoin value that allegedly resulted from the cyber attack is a classic example of the former driver. I would have been concerned if the cyber attack didn't affect the price of cryptocurrencies - it would have been a portent of a market that was not working properly.
In the 21st century, anyone that invests in any stock be-it traditional shares, or crypto currency should assume that the value of their investment may be impacted by cyber theft - it's just another one of the many risks that need to be managed these days.
News articles like the one in your post is an opportunity for the profit-takers to enter the market - time will tell if they are successful.
Long live blockchain and proof-of-work (and the fabulous "hash function")!!
Don