Crypto custody startup BitGo said on Monday it has confidentially filed for a U.S. listing, joining a wave of companies looking to capitalize on strong market momentum. The crypto sector's climb to a $4-trillion market value has reignited interest for initial public offerings, with clearer regulation, corporate treasury adoption, and institutional inflows fueling a new wave of new listings. Bitcoin, the world's largest and best-known cryptocurrency, recently hit an all-time high and breached