At the end of October, a coffee shop in Vancouver became the world first business to house a Bitcoin ATM (for more details, follow the story on CBCnews). The virtual currency can be traded for cash in most countries around the world, yet no country regulates its value. Concerns over this 21st century solution to economic turmoil is now reported in a research paper by Cornell’s Department of Computer Science, accessed through Fran Berkman’s Mashable article.