Cryptocurrency is a good investment if you want to gain direct exposure to the demand for digital currency, while a safer but potentially less lucrative alternative is to buy the stocks of companies with exposure to cryptocurrencies.
The long term positive coherence relationship observed between online metrics and price may be the result of another factor which we hypothesise could be technical progress. As a project makes technical progress, it is likely to have a community form around it over time, increasing online activity and also demand, and hence price, of the particular cryptocurrency. An interesting avenue of future work would be to consider the coherence between price and technical progress (via looking at each projects source code repository—these are available as cryptocurrency projects are generally open-source).

Cochrane, J. H. (2005), “Financial markets and the real economy”, Foundations and Trends in Finance 1 (1), 1–101.
— Meanwhile, Rover, the pet care site sometimes referred to along with its competitor Wag as the Uber of dog walking, has retained Mercury Public Affairs as its first outside lobbying firm. Mercury’s Mike McSherry, an alum of the RNC, Republican Governors’ Association and Labor Department, will lobby for Rover on tax and labor classification issues — a development that comes as the Biden administration has pledged to recognize workers dispatched by apps as employees rather than contractors. Gig companies are also facing new tax reporting requirements beginning next year, thanks to the coronavirus stimulus bill signed into law by President Joe Biden in March.