Solana and Coinbase are collaborating deeply, and with Coinbase's recent forward-looking speech about the x402 protocol, it feels like the x402 narrative is just beginning. Pay special attention to Solana's $PAYAI and Base's $PING. One is focused on x402 infrastructure, while the other leans towards meme. If x402 takes off again, these two should gain popularity. The technical iteration is relatively fast; they may not be the optimal solutions technically, but in terms of influence, they are definitely among the top.