Ethereum's highly-anticipated network upgrade is here. Here's how the change will impact the world's 2nd biggest cryptocurrency.

• Crypto execs and venture investors told Insider how Ethereum's upgrade will impact the market. 
• The second-largest crypto could see heightened volatility as a result of the changes, one expert said.
• Another exec explains how the network tweaks may drive further institutional investment in the ecosystem.

Ethereum's highly-anticipated software upgrade went live late Wednesday, and its implications for the second-largest cryptocurrency are huge.