Whether a company can freeze crypto assets depends entirely on the architecture of the specific asset and network involved. For centralized stablecoins like USDC and USDT, the issuers Circle and Tether have built freeze functions directly into their smart contracts, allowing them to blacklist specific wallet addresses so that the tokens in those wallets cannot be transferred. This is possible because both companies maintain administrative control over their token contracts as the issuing entities. For decentralized assets like Bitcoin and Ethereum, no single entity has the technical ability to freeze funds because the network is governed by distributed consensus rather than any central administrator. The distinction is fundamental: freezing is a capability that exists by design in some assets and is architecturally impossible in others.