BlackRock expands its BUIDL product to Aptos, Avalanche, and Layer 2s like Polygon and Arbitrum.BlackRock aims to enhance its reach in the crypto space and offer more institutional investment opportunities.The BUIDL token provides stable value and monthly dividends, with over $500 million in assets under management.BlackRock's multi-chain support strategy enables BUIDL to interact with decentralized finance ecosystems on each supported blockchain.