It's a very nice development for a person to design his own T-shirt, not a expensive price of 20 dollar, but it caught my attention; Why is not Bitcoin paying?
yes it's a good and creative idea, because it indirectly will promote bitcoin to everyone for those who do not know and understand about bitcoin. and that is one of the more advanced bitcoin developments. Advancing bitcoin is tantamount to helping people in trouble because bitcoin will help them if they join bitcoin in any way.