Personally, I don't like that pouch for a psk. It'll be troublesome if wet (e.g. the laces may bind) and it doesn't offer any water protection.

That being said... I carry the very same pouch whenever I travel by air. Empty, it goes through TSA security with no glitch. On the ground, filled with a hand full of change or even gravel.. and in my right back pocket with the lace hanging out.. well. Let's just say that in Amsterdam once I calmed down a pickpocket with a short stroke to side of the head.

The cop who picked up the guy suggested that in the future I keep coins, not gravel, in the pouch. That way there is no question that I was carrying a coin purse and not a sap. He did admire my gravel collection, and suggested I leave it there on the ground.

But I don't like it for a PSK.