Goldman Sachs, without taking a strong position on the future of Bitcoin, released a discussion paper that acknowledges that we are “in the first innings of a shift to natively digital transactions,” report John Biggs and Jonathon Shieber for TechCrunch. While the Goldman paper doesn’t advocate holding Bitcoins for value, it notes that there is a growing financial ecosystem growing up around Bitcoin and other digital currencies, and investors can increase exposure by getting involved in companies that offer related services. Hard to separate Bitcoin hype from fundamentals Bitcoin’s value is based largely on speculation right now, and high volatility…