90% is really huge; I would have said 70–85%. About 20% of the adult citizens of the U.S. have already adopted the technology, holding little pieces of the total in circulation. They might not completely run to Bitcoin; they just want to be on both sides. It's not easy to leave one's currency and fully depend on Bitcoin. It's not as if we don't know the truth sometimes, but we allow ignorance to blindfold us.