WBTC yVault wallet

What is WBTC yVault (YVWBTC)?

Holding YVWBTC means holding a share in a Yearn vault whose underlying asset is WBTC, not holding WBTC directly. Shares are minted when WBTC is deposited and burned when it is withdrawn; what changes over time is how much WBTC one share redeems for, while the share count sitting in a wallet stays exactly as it was. A balance that never moves on its own is normal here - this is not a rebasing token, and nothing gets delivered to the address by transfer.

There are two layers between this token and actual bitcoin. Redeeming shares at the vault gives WBTC, and WBTC is itself a custodial claim on BTC that has to be unwrapped separately. Sending YVWBTC anywhere near a Bitcoin address is meaningless: it is an ERC-20 token and it only moves on Ethereum, with ETH paying the fee for every transfer or vault call. Yearn has also run more than one vault generation, so the same asset can have an older and a newer share token in circulation; check which one you actually hold before interacting with a vault contract.

Supported networks in Tangem (1): Ethereum.

A vault share is the kind of position you open once and revisit rarely. With Tangem the signing key is created inside the card's chip and never comes out of it, and the backup is a second card holding the same key rather than words on paper, with a seed phrase available only if you specifically want one. Months of untouched storage are precisely the conditions that setup is built around.