The limit: Addresses are like nicknames (pseudonymous), not your real name. But if you ever send crypto from an exchange (where you did KYC with your ID), experts can often connect your name to the address. Privacy coins and mixers try to hide this, but regulators watch them closely.
3. Counterparty & Platform Risks: Not Everything Is Truly "Decentralized"
Many projects call themselves "DeFi" (decentralized finance), but they still have hidden weak points:
Bridges (used to move crypto between different blockchains) get hacked a lot, billions stolen.
Some "decentralized" apps still have a team that can upgrade or pause the contract.
Oracles (that bring outside data like prices) can be manipulated.
Centralized exchanges hold your coins like a bank if the exchange fails, your coins can disappear.
Here's the big difference between old banking systems and blockchain: