#MastercardStablecoinCards According to Cointelegraph, decentralized settlement protocol Kima has joined Mastercard's sandbox program, facilitating stablecoin-powered top-ups for prepaid cards directly from self-custody wallets. This integration allows Mastercard partners to utilize Kima’s settlement infrastructure, enabling prepaid cards to be topped up with stablecoins such as USDC and USDt from self-custody wallets across more than 10 blockchains.