“Only certain things in life are death, taxes, and bitcoin.”

I read that this morning along with other statements just like it. They state that Bitcoin is their savings account to the extent they have all their money in it. Why are they so confident in Bitcoin? Even the greatest investors know that there’s a chance they’re wrong. If anyone has any insight please enlighten me. We all know you can’t ask these kind of questions in the Bitcoin forum without being sacrificed to the all mighty Michael Saylor.