in my opinion you should be careful in making t-shirts that have bitcoin logos or images,
because the government in your country prohibits buying and selling bitcoins so you have to be careful.
this is indeed a good idea and I also understand your goals and intentions, but in my opinion it would be even better if you made a permit to the government that you would make t-shirts with the bitcoin logo if allowed, keep working on making t-shirts with logos like that.
if it is not permitted by the government, in my opinion, it is better for you to obey what the government in your country says.
maybe with the logo, it must be ascertained whether someone has already applied for a patent. if someone has made it, it is certain that not just anyone can use the logo and must have a permit. but if not then there is no obligation to do the permit, so it can be made to be sold as commercial goods.
but if the problem is like what the colleague said above, that there is a ban from the government, then you really shouldn't take actions that are against the law.
but if the prohibition is transactions against bitcoins, it is also confirmed whether there is a prohibition on logos being made on t-shirts, because there are two different sides, there is not necessarily a ban.
but once again if there is a prohibition, you should still be careful with the rules that have been made and are not meant to be violated.