It can technically be used to extend your stay in Palau long enough to establish tax residency since it would allow you to stay in Palau for longer than 183 days a year. Not unusual for people sitting on big crypto stashes to move abroad or buy citizenships in order to cash out their crypto without capital gains tax (or at least that’s how it goes - I imagine the IRS doesn’t go down that easily).

The whole point of this card is basically to bypass KYC requirements for crypto exchanges that don’t allow US customers. They are very explicit about this in their marketing.