Since the introduction of Blockchain technologies in Bitcoin (Nakamoto & Bitcoin, 2008), there has been over a decade of innovation and growth. The cryptocurrency markets have formed their own ecosystem and followings. On Wednesday 12 th May, 2021, cryptocurrencies reached their highest total market capitalisation yet, at $ 2.5 trillion (coinmarketcap.com, 2021). This rapid growth in valuation has attracted many new entrepreneurs and investors into the industry. However, the cryptocurrency world comes with its own set of challenges. This research is the first to create a multivariate model of the effects of external variables on cryptocurrency prices. For the first time, the results enable to compare the magnitude and direction of effects from price volatility, macro-economic trends, Github statistics, Google trends score, Twitter sentiment, community size and Internet activity levels. The model proposed in this thesis can help managers, developers and investors alike in understanding external risks to cryptocurrency projects.