• Grayscale, a cryptocurrency investment management company, will extend its review period for an additional 180 days to determine whether or not it should acquire and sell proof-of-work Ethereum (ETHPoW).
• The initial review period was expected to last less than 180 days, but the company decided to extend it due to the uncertainty surrounding the trading venues and liquidity of ETHPoW tokens.
• The value of the token is likely to fluctuate significantly for a period of time if digital asset custodians choose to support the token and a trading market develops.
• Following the Ethereum hard fork, which moved the network from proof-of-work to proof-of-stake, the price of ETHPoW soared to $51.45 and then plummeted. It is currently trading at $3.40.

The article presents a neutral tone, providing information about Grayscale's decision to extend its review period for ETHPoW. It highlights the uncertainty surrounding the trading venues and liquidity of the token, which may affect its value. The article also mentions the price fluctuations of ETHPoW after the Ethereum hard fork.