tBTC is a decentralized wrapped Bitcoin that is 1:1 backed by main-net BTC. Unlike other wrapped Bitcoins, the BTC that backs tBTC is not held by a central intermediary, but is instead held by a decentralized network of nodes using threshold cryptography.
tBTC is trust minimized and redeemable for main-net BTC without a centralized custodian. It can be used across the entire DeFi ecosystem.
tBTC can be used as collateral, liquidity, a store of value, and can be integrated with DeFi apps across all blockchains.
As with other BTC wrappers, tBTC provides cryptocurrency traders and general users with a non-volatile BTC token, that can be used to generate yield whilst holding main-net BTC.
## Why use tBTC?
Existing solutions that bridge Bitcoin to the multi-chain ecosystem require users to send their Bitcoin to a centralized intermediary to exchange it for an Ethereum token that represents the original asset.
This centralized model requires you to trust a third party and is open to censorship and potential fraud. This opposes Bitcoin’s core ethos of a secure and permissionless store of value.
tBTC is a truly decentralized Bitcoin bridge that provides Bitcoin holders permissionless access to DeFi.
## How does tBTC work?
tBTC replaces centralized intermediaries with a randomly selected group of node operators on the Threshold Network. This group of independent operators works together to secure deposited Bitcoin through threshold cryptography.
A majority threshold agreement from node operators is required to mint or redeem tBTC. Node operators are constantly rotated, which protects deposits against any malicious individual or group.
Unlike other solutions on the market, tBTC users are reliant on math, not hardware or people.
## How Many tBTC Are There in Circulation?
tBTC (v2) Protocol launched on January 31 2023, and has a floating circulating supply, depending on the number of tBTC minted and redeemed. Minting tBTC currently requires a 0.2% fee, which is paid to the Threshold Network DAO. A full breakdown of tBTC circulating supply and mint/redemption stats can be found at https://dune.com/threshold/tbtc.