Bitcoin Security:
✅Crazy large numbers
✅ ECDSA
✅ Private key set up
✅ Private key management tools
✅ UTXOs stored on widely distributed nodes
✅fee market: responsively resistant to attacks
✅ coin emission and time stamping via POW
✅ node consensus enforcing monetary policy
✅voluntary updates with backwards compatibility
✅ mining incentives: soaking up low cost energy
✅ energy producers
✅humans who embrace personal responsibility