Vitalik Buterin's urging for Ethereum developers to build on the mainnet is a significant trend, indicating a potential focus on core Ethereum development. This could lead to increased activity and value for ETH as developers prioritize the main chain. Additionally, the Rekt Invitational golf event, featuring crypto stars and a strong lineup from MoonPay, highlights growing mainstream engagement and networking within the crypto industry, potentially boosting visibility for associated projects like Rekt Drinks ($REKT).