MAJOR BITCOIN FLAW FOUND
God can hack your bitcoin. Yes. The same God that created the universe, life and human consciousness, He can hack your bitcoin. In fact, He can do anything, including hacking your bitcoin.
Long term, nothing we can do about it, HOWEVER, we can fork bitcoin and freeze satoshi's coins, because that may hold Him off for a while.
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This is how I interpret your quantum fears. Maybe you don't believe in God. Well I don't believe in quantum. I think it is a theoretical concept used to fill a God shaped hole for some very depressed mathematicians. Quantum will never do anything tangible.