Shielded Bitcoin replicates Zcash’s privacy tech in Bitcoin but lacks validation, security, and an operational peg, unlike Zcash’s established privacy solutions.
“Zerocoin started in 2013 as a plan to add privacy to Bitcoin. Bitcoin wouldn’t take it, so Zcash was built. Thirteen years later, Bitcoin’s best private design is a partial copy of Zcash, and it can only work by keeping Bitcoin itself out of the loop.”