"Old Faithful" may go through occasional periods of faithlessness. Or its regularity may be a relatively recent and temporary phenomenon (within the past few hundred years).

Or its current unpredictability may be essentially unrelated to the big blast to come.

The apparent fact that the "bubble" under Yellowstone is forcing the surface upwards at a current rate of about an inch a year may be much more important.

Or it could begin to sink again, which could be the real danger signal.

Or not.