Minimalism is a concept that started to take root in the earlier decades of the twentieth century, and it was a direct response to the maximalism that was rife in the preceding century. After the industrial revolution, people were suddenly able to take advantage of a far higher quantity of abundance, and they therefore started taking part in things like conspicuous consumption that would mark them as members of the higher social classes. By the time the twentieth century came around, maximalism was so commonplace that it began to be seen as rather tacky, and minimalism quickly swooped in to replace it.
The main difference that minimalism brought to the table was that it disincentivized the use of ornateness in things like Metal Business Cards. The ability to make something extremely ornate was a skill that needed to be honed over decades, but that was no longer the case after machine printing came to the fore. Since everyone could make things ornate just by opting for those designs, the idea of using nothing but clean and simple lines started to seem a lot more appealing.
Nowadays we can see all sorts of business cards, but minimalism continues to hold strong as the aesthetic of choice. It actually has some practical advantages as well, since minimalist designs allow you to easily add informational details that would you might not have had to room for if you were too flamboyant with the design. We would suggest that you use a simple framework with text and no outlines to give your card a futuristic look that is more or less in line with what people have come to expect from them.
