Ether, the second-biggest cryptocurrency, today passed $4,000 for the first time since 15 May, with analysts citing frenzied demand for non-fungible tokens (NFTs) as a driver of recent momentum.
The token, linked to the ethereum blockchain, was up 5.02% to $3,976.57.
It has soared around 25% in the last 15 days.
Joseph Edwards, head of research at cryptocurrency brokerage Enigma Securities, said ether was in high demand as investors continue to pile into NFTs, many of which are based on the ethereum blockchain.
"It's still primarily the NFT boom that's driving markets - not directly," he said.
"It's bringing some speculative interest back in the door."
