Serum skins are recognizable for their unique skin appearance, consisting of a chrome base coat that has been painted with various reflective metallic paints in a digital pattern. So far, the Serum family has only a single member within its ranks, it being USP-S Serum. Skins belonging to the Serum family are very sought after by players which in turn makes them very valuable.
Since skins can be sold and traded on different markets, many players consider popular skins an investment. On DMarket you can trade CS:GO skins. If trading is not your cup of tea then you can sell your skins immediately and buy something you might need more.
Check out other CS:GO skins families: