@Thaimer *****
I've once lost all my cash. Stolen by a fellow traveler. I still regret having withdrawn too much, though it wasn't as much as 20k. I remember realizing that it wasn't really safe but I wanted to save a few pennies on withdrawal costs, like you suggest. If only I had not bothered about the pennies.
But well, you do you. It's of course not wise, and no, others don't do it, and yes, you may also encounter an unlucky moment one day. If not, luck is with the stupid, they say. But I'll be happy for you.