According to a report by The Wall Street Journal, Coinbase, the leading US cryptocurrency exchange, has agreed to buy crypto options trading giant Deribit for a staggering $2.9 billion. Coinbase intends to gain a firmer footing within the thriving crypto derivatives market with the latest deal. The shares of Coinbase are up nearly 5% in pre-market trading. The crypto megadeal comes after enterprise blockchain Ripple announced that it was buying prime brokerage Hidden Road for $1.25 billion. Kraken, one of Coinbase's main competitors, agreed to acquire futures trading platform NinjaTrader for $1.5 billion.