Nothing to do with quantum mechanics. 

He's trying to over complicate Multisig wallets and Blockchain templates.

Schrodinger's cat is a metaphor and is not true at the atomic level (the cat). 

Quantum effects only happen at the subatomic particle scale and at near absolute zero temperatures.

A sub atomic particle before it forms has infinite possibilities. 

It turns out, they are not possibilities, but they are all true until the subatomic particle quantifies (forms).