The ongoing Ethereum 2.0 upgrade has had a mixed impact. On one hand, it has increased market confidence due to promised improvements in scalability, security, and energy efficiency. This has led to some price appreciation as more investors are attracted. However, the slow implementation process has also caused some uncertainty. In terms of market share, it still remains the second - largest cryptocurrency, but faces competition from emerging blockchains. In the future, if the upgrade is successfully completed, Ethereum may see further price increases and potentially gain more market share as it can better support DeFi and other applications.