Cryonics, for example, is a good low-hanging fruit if you can just get people to sign up for it.
Modafinil is another good low-hanging fruit, as far as utilons/​hedons per lifetime goes. Melatonin, too, and is less illegal.
Modafinil is another good low-hanging fruit, as far as utilons/​hedons per lifetime goes. Melatonin, too, and is less illegal.