This is exactly what got me started with the idea.
I was travelling out of state, and my friend stopped at a 7 eleven at midnight, and I was standing in line with gatorade. This ghetto chick in front of me bought a pack of smokes and kept the change in bills between her skin and bra. This got me thinking that this is quite unsanitary seeing that money is transferred between dirty hands all the time.
For the gun holster, well I'm imagining it to be where the strap connects the two cups, you know in the vicinity of the lower sternum area, below the breasts. So if the women is wearing a Tshirt, she can reach her arms into her shirt (if it's not tucked in), and access to the gun quick, and bring it down quick out of the shirt and be ready for action.
I wanna mass produce it, and make it a standard component for future bras. Well at least the pocketed version