Probably waiting to get an attorney and other affairs in order. Every asshole and their uncle will be crawling out of the woodwork looking for a handout, so it's best sometimes to lay low. We had a $111 million dollar winner around here about 20 years ago that once he learned he won immediately flew to Florida to get out of the limelight and get things set up. He was gone about a week and when he came back and claimed everything ran much smoother.
That certainly is a lot of cashola!