Ethereum co-founder Vitalik Buterin has once again become a crypto billionaire, just days after Ether surged past the $4,000 mark for the first time in eight months, according to blockchain intelligence firm Arkham. “Vitalik Buterin is now an on-chain billionaire again.” Arkham His portfolio is currently valued at around $1.04 billion, consisting of 240,042 ETH along with smaller holdings in cryptocurrencies such as Aave (AAVE), WhiteRock (WHITE), Moo Deng (MOODENG), and Wrapped Ethereum (WETH). Ether’s rally has fueled optimism among traders for potential new all-time highs. On Saturday, ETH climbed 6.38% to reach $4,332, following its $4,000 rebound on Friday,…