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