Binance, the cryptocurrency behemoth, agreed to buy rival FTX after the exchange experienced a liquidity crisis. The deal was announced on Twitter by Binance founder Changpeng Zhao and FTX founder Sam Bankman-Fried. The terms were not made public. Mr. Zhao stated that the agreement is nonbinding and that Binance may withdraw from it at any time. “Things have come full circle, and FTX.com’s first, and last, investors are the same: we have come to an agreement on a strategic transaction with Binance for FTX.com (pending DD etc.),” Mr. Bankman-Fried said in a tweet that was confirmed by the company.