Ethereum is the second biggest cryptocurrency by market value, and “Shark Tank” star Mark Cuban just told Fortune that he is still “very optimistic” about it.
Mark Cuban, a billionaire investor, is among those who favor the “merge” of Ethereum, a long-awaited improvement to the blockchain that would greatly lessen its negative impact on the environment.
When the merging upgrade is live, in less than a month, Ethereum’s power usage will …