The Currency, Hirst's most recent art installation, consists of 10,000 A4-sized pieces of handmade paper covered with extremely similar but not identical colored dots. Each is identified with a number and signed by the artist on the reverse, along with an artistic title. Each features a watermark, a microdot, and a hologram to make it difficult to fabricate, just like genuine modern bank notes. Hirst has turned this into an intriguing experiment in the very irrational dynamics of collectors and blockchain technology.