Former SpaceX mission manager John Rising has raised $4.2 million for crypto startup Stackup, which aims to provide businesses with 'centralized control of decentralized assets.' The Los Angeles-based company, which has developed account abstraction technology for platforms like Coinbase, received its funding from Y Combinator, Digital Currency Group, and others. Stackup allows businesses to implement features like spending limits and bulk transaction reviews, thus enhancing security and usability. Rising emphasizes the importance of safety for users in crypto, citing a tragic incident from his past in aerospace engineering where human oversight was overlooked. The innovative account abstraction technology Stackup employs allows for non-custodial wallets and aims to simplify crypto management, comparing it to managing email. This venture seeks to prevent catastrophic on-chain errors and improve the overall safety of user assets in the ever-evolving crypto space.

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