In many places Btc is one of the safest ways to store value. The scenarios it could collapse under are dark. It's biggest enemy is soveriegn currency issuers and banks. They would need to attack it such that holders lose faith in it en masse and collapse it. The successful attack they need to make is dystopian in nature. It would require a global digital identity that was attached to all internet access and an alternative (CBDC) crypto that they forced everyone to use.