Study #bitcoin https://video.nostr.build/ff908315546513c552311f089f81016397a78701c1c38fd4ea99a2d21a6467c5.mp4 nostr:note1ayp9pgqfcf9uvg9pnrr5f5n4mk0xmd292lh0kwadgg4cmnjpfkjsae0az9