Ethereum just completed a successful dress rehearsal for its most important upgrade ever

Ethereum just completed its first big dress rehearsal for a long-awaited makeover that will be its most significant overhaul since the digital currency was launched nearly a decade ago.

Cryptocurrencies such as ethereum and bitcoin are often criticized for the process of mining to generate new coins. Both currently use a so-called proof-of-work mining model, involving complex math equations that massive…