This physical representation of the bitcoin can be worn as a pin, a brooch or even as hatpin if you like. At the back is a solid brooch body, that is easy to insert in woven fabric. Available in precious metals (so if there is trouble with the currency, you can always melt your golden bitcoins)
If you want to pay in bitcoin, you can use this link. Please add €10,- for postage and enter the name of the product, material and post address in the description.