People will tell you that the afterlife is a wonderful thing until somebody you know goes there, and then they will get upset, and expect you to do the same.
People are not rational. They stretch a veneer of rationality over the sight of emotional decisions and greed.
If your girlfriend has a dream that you are unfaithful, you will be in trouble when she wakes up.
Unlike in the superhero stories, real life villains are not consciously evil, just partly insane. Almost everyone thinks they are fighting the good fight because of some past injury.
A good idea trying to survive on it's own merits is like an abandoned baby. You have to protect it from all the older ideas until it has made lots of friends. Usually, it will lose out to a worse idea with better promotion anyway.
Most of the money spent on cars, and over 99% on pleasure boats, is used to create an image, not provide temporal displacement. Without them, we'd still see rich people in absurdly elaborate clothing.
You will see the world population triple, but people won't understand why there are more disputes between neighbours in the crowding, and try to behave in obsolete ways to fix things. This is a result of the same thought process that copies the appearance of supersonic shapes onto subsonic cars, and put fake wooden peg heads in the Parthenon frescoes - they "look right" because of old familiarity and chance association.
If you ask people about themselves, they are usually happy to talk, and afterwards, they will think they know you better.
Few to none will understand you, but there is hope for having only benign misperceptions to deal with.