WBTC is a DeFi-compatible version of BTC backed by BTC reserves held by a licensed custodian (BitGo).
WBTC is a mid-cap, fully collateralized asset. This asset depends on a centralized entity for custody services. This asset is exposed to the underlying risks of Polygon zkEVM bridge, a protocol rated as Good.
Polygon zkEVM Bridge
WBTC has a fixed supply. WBTC is a DeFi-compatible version of Bitcoin. It is backed 1:1 by BTC custodied by BitGo. WBTC on Polygon zkEVM is backed 1:1 by WBTC locked on the Ethereum chain in the Polygon zkEVM bridge protocol.