The Bitcoin blockchain can not directly integrate into the Ethereum-based world of Decentralized Finance. To help investors work across blockchains, tBTC is an Eth token that is backed one-to-one by a BTC. It is pegged directly to the supply of BTC available to the tBTC community. This correlation with BTC allows a range of DeFi trades that are otherwise impossible on one chain or the other. There is no algorithm keeping the price equal to BTC. Each tBTC can be redeemed for 1 BTC. To protect investors, it has built in offchain custodianship with the KEEP network and is simultaneously overcollateralized by Eth. If you ever wonder why you can’t earn DeFi staking rewards with your BTC, tBTC exists for you.