DreamOS, a Web3 operating system, raised $2.10 million in a seed round led by Arca Fund, with contributions from Hack VC, Mantle Network, P2 Ventures (Polygon Ventures), Karatage, Selini Capital, No Limit Holdings (NLH), Altcoin Sherpa, Pentoshi, WSB Mod, RookieXBT, and EllioTrades.