In fact, I think that the desire for "permanent wealth", that cannot be lost or lose its value, is as naive as the desire for eternal youth or eternal life...
How is the desire for eternal youth naive?
Before airplanes were built, it would be easy to call the desire for human flight naive, especially given the stupid first attempts (people attaching wings to their arms and jumping off buildings). A real discussion should entail the feasibility or impossibility of something based on its properties, not just "it's something people have been wanting since forever, and they haven't accomplished it yet, therefore it is impossible and a stupid idea".
I am very curious as to your objections why eternal youthfulness would not one day (probably far into the future) be feasible.