I carry a fossil wallet that has a thin wallet that slides into one end. I carry the thin wallet in front of me, as high as possible, it has my ID, permission of infringement, a credit, debit, $100 bill, some health insurances cards. The bigger portion carries some more cash, different debit card, bunch of random cards (keep wherever convenient). That's my throw away wallet, I'll chuck that crap and cancel the card later as I'm running away from the threat, let him chase the few dollars. Meanwhile I keep all the important stuff on me.
I have no intention of carrying anything iwb anymore. Comfort and and correct sized pants all the way for me.
“One of the illusions of life is that the present hour is not the critical, decisive one.” – Ralph Waldo Emerson