According to the source, Ethereum researcher Dankrad Feist has left the Ethereum Foundation to help build Stripe’s Tempo blockchain, with the post stating a reported $5 billion valuation (source: public X post dated Oct 17, 2025). The shared link headline also indicates Tempo raised $500 million, underscoring substantial funding for a payments-focused blockchain initiative (source: headline text of the shared link in the same X post, Oct 17, 2025). For traders, the combination of a $5 billion valuation and fresh capital points to rising competition in payments-oriented L2 and scaling stacks that could influence ETH ecosystem sentiment and flows (source: details cited in the public X post and shared link headline, Oct 17, 2025).