Layer 4 is we make bitcoin into physical plastic notes and pay an institution to keep track of them. 🤫😐😄 nostr:nevent1qqsy8m7tw9cpsxyh335eu5ctathruv3hn23cm906nfu99lh09de6fyqppemhxue69uhkummn9ekx7mp0qgsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3grqsqqqqqpjjm94s