Odaily News Bitcoin liquidity re-pledge protocol Echo Protocol has completed its pre-seed round of financing, with participation from ABCDE, Maelstrom, The Spartan Group, Selini Capital, etc. It is reported that Echo is a Bitcoin liquidity pledge and re-pledge protocol, and introduces a new liquid asset class to the Move ecosystem. By working with Bitcoin ecosystem partners, Echo seamlessly integrates with all native BTC L2 solutions (including Babylon) and supports a variety of BTC liquidity pledge tokens.