Any special designs for girls? 
That's a really good idea! I don't ever wear t-shirts. I prefer tank tops!
Well tank tops can have Bitcoin design on it too
And I think it will looks good! (depends on a design:P)
Girls! You must start a Bitcoin fashion wave!
Yes I just imagine two coins BTC on the brest
I dunno why my imagination about this future design was pretty the same like yours
Just in my case there was word "Bitcoin" on one breast and just one BTC on another
But your idea seems pretty good too!
So. Designers. Get to work.
like this?
http://pirateprintingcompany.com/collections/frontpage/products/bitcoin-t-shirt-cryptocurrency