http://invest5wf2dctgqw2otcsq24wozas43f5mixti4u5wf6iwxcdod6vjyd.onion/algorithm-bitcoin/index12.html
Bitcoin isn't the sole way to purchase child pornography online, as Troels Oertling, head of the cybercrime unit at Europol, states, "Ukash and paysafecard... have [also] been used to pay for such material." However, the Internet Watch Foundation lists around 30 sites that exclusively accept bitcoins. Some of these sites have shut down, such as a deep web crowdfunding website that aimed to fund the creation of new child porn.