You obviously don't understand Bitcoins if you think they should be made of bullion. The copper is to look nice. Inside is a storage chip that contains the solved code to make one bitcoin. In Crypto We Trust. Yes, I do believe they have physical bitcoins. Since bitcoin is valued at around $500 (Vault51 is selling them at $590), and Vault51 is making $6,820 on average per day, it would be a rough estimate to say that they sell around 11 Bitcoins a day - physical ones.