Hi, Andre...try this link...
https://goccf.com/t/4204There is no short answer to your question. It all depends on how "serious" a photographer you are and how much you want to spend on equipment.
Generally speaking, if you buy a "point and shoot" digital camera, be sure that it has "macro" and "super macro" capability, that you can adjust "white balance" (according to the light source) and that you can set the f/stop to give maximum depth of focus for the amount of light. I would imagine a $200-300 camera will be about all you need.
If you want to go with equipment that will give you greater range of photographic potential beyond taking snapshots at the family reunion and good pics of your coins, then get a digital SLR camera. This will cost a lot more...anywhere from $450-$5000 depending on what you get. And then you'll need special lenses, etc. For photographing coins, though, you will need a "macro" lens that gets you to 1:1 (where the size of the image on the camera's sensor is identical to the actual size of the coin.) You will definitely need a tripod or other means of supporting your camera and lens.
Good luck...there's lots of excellent photographers on the forum who can give much advice regardless of your choice of equipment. If you are new to photography, don't get overwhelmed...it really isn't hard to get good coin pics...but it does take a bit of experimentation and time to get your set-up "just right."