any information is much appreciated, thank you
you can check this link below on alibaba where there are a whole series of sellers offering different solutions (both minimum order and product customization).
https://www.alibaba.com/trade/search?IndexArea=product_en&CatId=&fsb=y&viewtype=&tab=&SearchScene=&SearchText=bitcoin+hologramthese sellers are indexed with terms "bitcoin + hologram" so I guess they know very well why/what they are producing.
obviously it is impossible to know a priori their good faith (even if some have enough feedback to be trusted).
In these cases I would proceed with "minimum" orders such as 100 pieces to verify the quality and seriousness of the seller ...
Some sellers provide also product test for a cheap price, and generally speaking they are offering these holograms for few cents...
in my search (EU -ITALY) for a similar product I was able to find only this one online (and I admit that I should also turn to local printers to see if they have any solutions but I doubt about it, since I don't think are available locally or have a reasonable price)