If the Philippine government is displaying it, they were probably the buyers. Obviously he didn’t get $100 million for it though.
Or even $1 million. Governments have a way of stealing things from you when they really want to.
That being said, I can't think of a more worthwhile purpose for the thing. It wouldn't bother me if all "Objet d'art" valued at more than a million were seized by the government and displayed to the public.
What people nowadays give for "works of art" makes me think the entire art industry ought to be financially destroyed. That and the fact that so much of it is crap nowadays.