don’t worry. most of people who buys or use bitcoin doesn’t truly understand it. to really understant why it works as it works, you need to study a bit cryptology, so that way you can get what is digital signature and cryptographic hash function and how they work
Carry a fork with you. If someone tries to rob you, pull the fork out of your pocket and say “thank you, Lord for this meal I’m about to have” and charge at them with the fork