BitGo, a provider of trust and security services for digital assets, said on Monday it has confidentially filed for a U.S. listing, as crypto firms race to capitalize on renewed market momentum. Several high-profile companies, including those in riskier sectors like crypto and fintech, have launched successful listings in recent weeks, signaling pent-up demand and a rebound in capital markets activity. BitGo's announcement follows the crypto sector's market value hitting $4 trillion last week,