Some believe that the NSA will eventually hack bitcoin
SHA256 is NSA
NSA never released a crypto that they didn't own the back-door, never nada, never has happened in their history.
BITCOIN is SHA256, ergo BITCOIN is NSA
"Google is NSA" - PUTIN
NSA is just watching and waiting to learn 'when' it becomes "PUBLIC KNOWLEDGE" how to crack SHA-256.
The favorite theory out there is that BTC was created as a financial incentive to crack SHA-256, its been what 8 years, but the financial incentive is there, 100's of BIllion's of USD.
If I was running BTC-ORG I would have bumped BTC to SHA-512, or SHA-1024 a long time ago, and that CRYPTO will not be broken for many years to come.