Pump.fun, a memecoin platform on Solana, is preparing for a $1B ICO at a $4B valuation. The team is considering a buyback-based model to share revenue with token holders. PUMP tokens will be fully unlocked at TGE, with 25% allocated for public sale and 10% for an airdrop. Since early 2024, the platform has generated $677M in revenue. The ICO is expected to reinvigorate the Solana ecosystem after months of decline.