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 public market interest, while clearer regulation, corporate treasury adoption and institutional inflows are driving a fresh wave of listings across crypto and fintech. "Many crypto companies have matured. After more than a decade, they've built stable client