It's worse than not serving any purpose. It's information about your life that is forever stored out in the open. Except for some limited cases, it's no ones business to know whether I am insured and for how much.
Agree, and once quantum comps are more readily available - re-analyzing the entire chain and profiling individuals will be so easy, an AWS quant rental will be able to decrypt and do it.
I don't even know if quantum is necessary for that. There's already blockchain analysis tools. All you have to do is slip up once and tie a wallet that you didn't want anyone to know about to your identity and then it's relatively easy for those tools to be used to see everything you've done.
I almost paid for something with bitcoin once because they weren't taking anything else. Nothing illegal but also something I wouldn't want the world to know I paid for. I ended up choosing not to because I didn't want that transaction forever stored on the blockchain.
