Block, the Jack Dorsey-led payment company, has released its long-in-the-works Bitcoin hardware wallet — but you can’t use cryptocurrency to buy it. You can only purchase the $150 Bitkey wallet with your credit or debit card, a sign that crypto might not be as prevalent as its designers had anticipated.Block first introduced a prototype of the wallet in 2022 before opening preorders last December. The self-custody Bitcoin wallet, which Dorsey nicknamed “rockey,” lets users store cryptocurrency o...