The narrative around Bitcoin is evolving from a speculative asset to a strategic investment.Imagine telling someone in 2009, when Bitcoin (BTC 2.98%) was trading for just a few pennies, that one day, one of the most prolific companies on Wall Street would be buying the cryptocurrency. Well, that day has come as Goldman Sachs Group (GS -0.18%) recently disclosed a multimillion-dollar stash of Bitcoin in its quarterly filing.Bitcoin and cryptocurrencies in general have been primarily regarded as extremely spe ...