Kraken has secured a $200 million strategic investment from Citadel Securities, boosting its valuation to $20 billion. This follows a $600 million funding round in September, which valued the cryptocurrency exchange at $15 billion. The combined $800 million in new capital will be used to support Kraken's global expansion, develop new payment products, and strengthen its balance sheet as it prepares for an initial public offering (IPO) next year.