Like many people here, I use a moneybelt for my main "wallet" items and only carry a wallet with enough money for the day.
But I also have a cellphone I want to protect while it is in my pocket. So I thought of a possible anti-pickpocketing hack for those who wear belts.
I found a handle loop that can be attached and detached to a bag. I use this one:
Then I attached a key ring to the zipper on a Rick Steves wallet (my daily use wallet.) The clip on the handle attaches to the key ring on the wallet and my belt goes through the loop. (I may add a longer strap to the handle. )
My cellphone case has a carabiner on it and I'll also attach it to the belt loop.
(I wish I could post pictures.)
While it may not be 100% pickpocket proof, I hope it will slow them down enough to either think twice or I will feel it if someone is trying to get my stuff.