What is the biggest, or most regrettable, investing mistake you will never make again?
Either something that you had done (or not done), or wished you had done (or not done).
This is not to humiliate anyone.
But I would like to (try to) avoid getting myself into unnecessary investment pain.
And perhaps reading mistakes that other people have made might be really helpful.
It might help other people in the group as well.
Thank you very much for sharing.