Grayscale transferred $1 billion worth of Ether to Coinbase a day before the launch of the first spot Ether ETFs in the United States, set to start trading on July 23. This move is part of the preparations for the ETF launch, with Coinbase acting as the custodian for most of the newly approved Ether ETFs. The transfer involved 292,262 Ether to the Coinbase Prime deposit wallet. Following this, about 10% of the transferred Ether was moved to the Grayscale Mini Trust. This strategic transfer indicates Grayscale's readiness and significant role in the upcoming ETF offerings.