It's crazy the way are figuring ways to send #bitcoin. This is via radio waves using #meshtastic and #ecash: https://njump.me/nevent1qqste6zpvu2v6pv333yslslynv2tzlm3h5526hckdxexd7qwt5hfvsgpzemhxue69uhhyetvv9ujumt0wd68ytnsw43z7q3q5jnttpymeytm80hatjqcvhhqhzrhx6gxp8pq0wn93rhnu8s9h9dsxpqqqqqqz0c2ecy I did an ecash via sound a while back: https://crrdlx.vercel.app/ecashsound