bitcoin-trust-black. bitcoin-trust-white. Tshirt – In Bitcoin we trust zwart. Tshirt – In Bitcoin. Artikelnummer: TSHIRT-BITCOINTRUST Categorie: T-shirts. Share this . 99 Problems Bitcoin 19 Jul 2019. In his oral and written testimony (entitled “99 Problems,” after the Jay-Z rap song), Brummer raised concerns with the official “white paper” that. the math problem, ensuring that bitcoins…