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Ex-SpaceX manager John Rising's crypto platform Stackup raised $4.2M in seed funding. Led by 1kx, with Y Combinator and Digital Currency Group joining. It uses account abstraction for centralized control over decentralized assets. Features include spending limits and batch transaction reviews. Rising highlights system safety, saying crypto focuses too much on security over operations. The 4-person team previously worked on Coinbase and Trust Wallet's wallet tech.
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