The largest cryptocurrency spiked into five digits around 6 a.m. New York time on Sunday --- rising as high as $10,169, according to pricing compiled by Bloomberg. But it didn’t stay there long, falling back into the $9,000s about 10 minutes later, bouncing around for a while and then paring gains more decisively. It was up 2.2% to $9,941 as of 12:15 p.m.