Are you sure with that?
You can't literally hacked all of the things in the internet thus you can collect information through bypassing a security. That's the reason why some of the social media accounts where being hacked but literally they're being hijacked and the information was being collected. Also, blockchain has an ultimate security, you can't easily hacked each wallet and control the transaction. The only thing you can do is decrypt but that's not very sure you can do it.
Literally anything can be hacked online if you are not serious about the security, since the OP is talking about the website blockchain.com, sure it can be hacked if the hackers could figure out their loop holes, but when it comes to blockchain, good luck with it, there is nothing that can be done to hack that as we speak and i am sure people are trying their best to crack that puzzle You can't literally hacked all of the things in the internet thus you can collect information through bypassing a security. That's the reason why some of the social media accounts where being hacked but literally they're being hijacked and the information was being collected. Also, blockchain has an ultimate security, you can't easily hacked each wallet and control the transaction. The only thing you can do is decrypt but that's not very sure you can do it.
.