The Securities and Exchange Commission sued Coinbase, the largest cryptocurrency trading platform in the United States, on Tuesday, claiming that the company broke securities law by not registering as a broker.The nation’s top securities regulators filed the lawsuit a day after it sued Binance, the world’s biggest cryptocurrency trading exchange, for mishandling customer funds and lying to American regulators and investors about its operations.The regulator’s actions against the two major crypto companies reflected a broad effort to end what U.S. authorities see as the era of lawlessness in the industry. With these and other lawsuits, the S.E.C. has sought to reshape the crypto sector by grouping digital asset exchanges with more traditional financial firms, like securities dealers, while …
