Having heard what Marty and nostr:nprofile1qqsgt0d4sa0pz0wvn9yck36xxezf3qhwzksu0q254vruqed5wvuavusyfdmyk use for cold storage, how do you recommend converting BTC in cold storage to an offramp for local currency? E.g., BTC held in a nostr:nprofile1qydhwumn8ghj7un9d3shjv3wdehhxarjv9ekjcfwdejhgtcpzamhxue69uhkummnw3ezuumvda6xs7fwwa5kutcpzemhxue69uhk2er9dchxummnw3ezumrpdejz7qgkwaehxw309aex2mrp0yhxummnw3ezumn9wshsz9mhwden5te0wfjkccte9ec8y6tdv9kzumn9wshszymhwden5te0wp6hyurvv4cxzeewv4ej7qpqcvqlzvmjercdn0ypsmv8f7j9lge6ahsnueh5rparh53wuswftv4q28tp5y to an exchange?