Aptos will transition its ecosystem to the Fungible Asset (FA) standard, replacing the existing Coin framework, starting June 30, 2025. This upgrade, initiated by Aptos Labs, aims to enhance security, flexibility, and composability, supporting advanced use cases like DeFi and payments. The migration process will begin with new accounts adopting the FA standard by default from June 20, followed by the automatic migration of APT token balances on June 30. Other on-chain tokens will be migrated between June 18 and 22, with no action required from users. The transition will utilize batch trading tools, with gas fees prepaid by the ecosystem.