Stacks’ Bond 3 Bitcoin-staking offering sold out, with 21shares and Bullish among institutional participants staking BTC on the Bitcoin L1. The sellout marks 21shares’ return after participating in the Genesis Bond in September and Bond 2 in October, while Bullish staked BTC from its corporate treasury, according to BeInCrypto. Bond 3 targets a 3% annual yield, with BTC rewards distributed weekly onchain; participants timelock BTC and lock STX for six months, and staked BTC is returned in full. Bond 4 opens Dec. 3.