Hello! Do you have only black and white colors? or you can offer other colors?? I am interested in blue as it's my favorite one
In my opinion, irrespective of design and color of the shirt introducing such kind of thing will be really very much beneficial for the ones who still dont know anything about bitcoin. This will no doubt help number of people in knowing about bitcoin and later on, it will also help them in having some good amount of money too in the form of earnings which they will be making from bitcoin.
I will say that design too carries a very significance importance as you need to design something like which can at least make the people understand this thing that this is something related to bitcoin or anything like that. You need to think well and design something in a way which can make it far easier for a common person to understand about this concept as this is the reason of designing those shirts.