WASHINGTON - The sudden collapse of one of the world's largest cryptocurrency exchanges rattled the nation's capital this week, as lawmakers grappled with the wide-ranging fallout - and began to confront the consequences of neglecting the surging financial sector. Only a few weeks ago, top Democrats and Republicans alike had been cashing campaign checks and working side-by-side with the vanguards of the industry, including FTX founder Sam Bankman-Fried, as they labored to craft new regulation in