My own JW brother is doing that. He and his wife have life insurances. He admitted that he believes that he will die before the big A hits. He is 52 and in excellent health. He has insisted that his children get a University education. He supports wholeheartedly his two older sons in their new business. He has a 25% stake in that business. He puts money into a retirement account.
I sometimes think that he knows it's all BS, but it's to late to quit. His wife is a die hard believer. They have a zillion friends, all JW's.