El Salvador might have famously made bitcoin legal tender last year, but it seemed unlikely that any developed countries would follow in its example. Yet in a surprise move, Arizona has introduced a bill to do exactly that in the state. There’s just one small problem: the US Constitution doesn’t actually allow states to create their own legal tender independently from the rest of the country.

The cold storage wallet provider Arculus may be edging closer to competitors like Trezoe and Ledger, with speculation that it could become the third-biggest hardware wallet provider by the end of 2023. This could give a significant revenue boost to its owner CompoSecure, with one analyst predicting it could sell 160,000 units this year and even more next year.