Fun closed a $72 million Series A round co-led by Multicoin Capital and SignalFire. The onramping infrastructure startup handles deposits, withdrawals, and settlement for major crypto applications including Polymarket, Lighter, and Aave.

Fun solves a core problem in crypto adoption: getting fiat into and out of decentralized apps without friction. Most users still enter crypto through centralized exchanges, then bridge to DeFi. Fun compresses that flow by embedding direct onramp and offramp rails into applications themselves. Users can deposit dollars and withdraw to bank accounts without leaving the app they're using.

The funding validates that onramp infrastructure remains a bottleneck worth attacking. Multicoin and SignalFire betting $72 million signals confidence that Fun's customers will keep expanding their user bases and volume. Polymarket's recent surge in betting volume during the U.S. election showed demand exists for friction-free crypto apps. Aave adding onramp capabilities suggests DeFi protocols view this as table stakes for competing for retail users.

This fits the broader narrative of crypto infrastructure maturing. Better onramps reduce the activation energy for new users entering DeFi, which has struggled with mainstream adoption despite years of hype.