For crypto assets to truly integrate into everyday life, the payment layer must break through. An emerging payment card product is breaking the constraints of traditional custody models—users can directly top up their cards from self-custodied Bitcoin addresses such as hardware wallets, then seamlessly make purchases on the global Visa and Mastercard networks.

The key here lies in the architecture design. Throughout the entire process, the private key remains 100% in the user's control, with no third-party custody intermediaries involved. This means you truly own your assets, transactions are authorized by yourself, and the risks are entirely controllable.

Compared to products on the market that require transferring funds to platform accounts before spending, this direct connection to hardware wallets clearly aligns more with the spirit of self-custody. The bridge between on-chain assets and real-world payments is being reshaped.