What to know : Crypto markets stabilized in early U.S. trading Tuesday with bitcoin rising about 3% from late Monday afternoon to above $87,000. Crypto-related equities, including Strategy (MSTR), Robinhood (HOOD) and Circle (CRCL) saw early gains after yesterday's plunge. Despite the bounce, one analyst warned that crypto markets remain "fragile," with bitcoin likely to fell below November lows.