A few thoughts on this:
The 15 year gain may be enough to get you over the tipping point where medicine can cure all your ails, which is to say, 15 years might buy you 1000 years.
I think you are being pretty optimistic if you think the probability of success of cryonics is 10%. Obviously, no one has any data to go on for this, so we can only guess. However, there is a lot of strikes against cryonics, especially so if only your head gets frozen. In the future will they be able to recreate a whole body from head only? In the future will your cryogenic company still be in business? ...
Question for the advocates of cryonics: I have heard talk in the news and various places that organ donor organizations are talking about giving priority to people who have signed up to donate their organs. That is to say, if you sign up to be an organ donor, you are more likely to receive a donated organ from someone else should you need one. There is some logic in that in the absence of a market in organs; free riders have their priority reduced.
I have no idea if such an idea is politically feasible (and, let me be clear, I don't advocate it), however, w...
I have read neither the book nor the chapter you refer to, but I wll comment on fake beliefs: they are evidently beneficial, or else they would not exist, and I think that is because the goal of humans is not the achievement of rationality, but other things (Maslow, for example). Rationality may lead to those benefits, but it is only one way.
Let me offer you two specific examples:
The belief that the earth was created 6,000 years ago
Here in the USA a disturbingly large percentage of people hold this belief, something that is plainly not true, since all the ... (read more)