I mean theoretically ever the hardest encryption just buys you time. That time may be long past the lifetime of our own sun, but it just buys you time.

The same is true for locks and safes as well.

Being one of the few people who never had their bicycle stolen in a city where this is common, the trick that always works is: Just make your lock harder to attack than other locks that safeguard comparable things.

  Good lock + old looking bicycle = no theft
  

Unless your stuff is unique and high stakes that means regular criminals won't pick you since the surrounding stuff looks more intersting and is the easier target.