I would say that we dont know until someone cracks the code/algo. After that we can better say how likely it was intentionally made to be circumventable.

Im not sure what do you mean with second question. I dont think sha has nothing to do with tracing transactions. Transactions are public and tracable all the way from end to start.

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Just to be clear blocks contains hashes of previous blocks and transaction hashes, but i dont see how cracking sha256 would help to trace transactions. But im just hobbyist so i can be absolutely wrong 🤷‍♂️😂

I quess problem would be someone having advantage of generating blocks or figuring out private keys.