Tell you what— I definitely wanted a bitcoin themed shirt since FOREVER. The sole reason I still haven't bought one though, is that it's could potentially be a security nightmare. Wearing a bitcoin/cryptocurrrency themed shirt is definitely one way to get hit with a $5 wrench attack.
https://cryptosec.info/wrench-attack/I also thought of this, as much as I want and show it to the people on the road that I'm a bitcoin enthusiast and supporter I just can't. I might purchase one in the future but I'll wear it only at home.
@lovebit, does the design 2 can be customized by the customer and put his QR code in it?