definitely a mental thing, people have different definitions of rich
my view is that there is an amount of assets and income that gives you and those dependent on you a comfortable life into the future
anything above that would be rich, I.e. you have surplus wealth
but what’s a comfortable life? different for different folks
and if someone can take away what you have, then you don’t have a comfortable life into the future, you only have it for now
which in my mind is why we call nocoiners poor