Crypto trading just got safer, and that’s too bad

Cryptocurrency ATMs in Hong Kong. Ethereum’s changes to its blockchain add stability to crypto trading, at the expense of its decentralized and unregulated origins. (Kin Cheung/Associated Press )

Something called the “London hard fork” is going down.

If you picture a two-pronged implement jabbing into a pub steak, you have some catching up to do. This has…