Based on the latest countdown, Ethereum users expect the massive network upgrade to begin around 10pm PST, with the second-largest crypto is set to shift to a more environmentally friendly model that may help attract investors who opine that bitcoin's model uses too much electricity.

The Ethereum blockchain will transition away from its energy-intensive consensus mechanism Proof-of-Work as its execution layer merges with the new Proof-od-Stake consensus layer known as the Beacon Chain.

The so-called 'Merge' is like upgrading a rocket ship after its launch: "It is an epic engineering feat."