Cryptocurrencies have experienced significant increases in value in the last year. But things have looked less clear in the past few months. As there has been talk of the bubble bursting in the stock market, so too has there been talk of a cryptocurrency bubble pop. Is now a good time to assess the value of cryptocurrencies from a more reasoned perspective?

In order to predict cryptocurrencies’ future value, we should work to understand how value is derived. Value is a measurement of the ‘goodness’ of a given thing. Some things are instrumental goods, meaning they are goods because they allow us to access some other good. Intrinsic goods are good in and of themselves -- they are the thing we work to attain.

Adam Smith said in the Wealth of Nations that “money can serve no purpose other than purchasing goods." Currencies are instrumental goods. To be effective, currencies have to be mediums of exchange and stores of value.

So, the value of a currency is in its ability to do those things efficiently and effectively: facilitate transactions and act as stores of value.

Cryptocurrencies as Mediums of Exchange and Stores of Value

A few years ago, when digital currency was just rising in value, Paul Krugman asked this question, in a blog post titled “Bitcoin is Evil.” He wrote, “to be successful, money must be both a medium of exchange and a reasonably stable store of value. And it remains completely unclear why Bitcoin should be a stable store of value.”

Talking with Bitcoin boosters, Krugman complained, “When I try to get them to explain to me why Bitcoin is a reliable store of value, they always come back to with explanations about how it’s a terrific medium of exchange.” Krugman was saying that a currency’s ability to store value and its ability to mediate exchange are different matters entirely. But how are those two issues related?

(Read: Bitcoin Price and Real Time Updates)

Mediums of Exchange can become Stores of Value

If a currency is going to be a store of value, the value of it has to be stable. For a currency to have a stable value, it has to be an effective facilitator of transactions. For a currency to be that, it has to be ubiquitous. The ubiquity of a currency, and the increase of value that comes with it, is referred to as the network effect. The more widely a currency is used, the more flexibility that currency has to facilitate transactions, which stabilizes its value, because simply, the more people accept it as a valid form of payment, the more people will use it as a form of payment. And as a currency’s ubiquity rises, so too does its value.

Think about it: if you and two other people are the only ones to accept seashells as a valid form of payment, this means seashells aren’t a very useful medium of exchange. You can only exchange with those two who also accept seashells. And, if one of you stops accepting seashells, the utility, and thereby the value, of seashells drops significantly, because the flexibility of shells as a facilitator of transactions just dropped.

If the value of a currency is predicated on its flexibility and ubiquity, then that currency’s ability to become viable depends on its users understanding it as a better facilitator of transactions than other mediums of exchange. If a cryptocurrency is going to replace paper money, users have to believe that instruments like Bitcoin and Ether are better at facilitating transactions. So, then, the question is, in what ways does cryptocurrency improve on the technology of paper money?

(Read: IMF Urges Banks to Invest in Cryptocurrency)

The Case for Crypto

Before we move on, it’s important to know that cryptocurrencies are often lauded by anarchically-inclined communities. The relative anonymity they allow for, the difficulty to trace transactions, the inability of governments to regulate or restrict transactions, the limited amount of Bitcoin that will be printed (meaning that governments cannot simply print more money in order to pay for things, thereby creating massive inflation) and the potential of destabilizing and decentralizing government backed paper currency are all points of excitement for anarchists.

Allow me to make a case for cryptocurrency in straight-forward, non-pro-anarchical terms. Since the vast majority of us are not anarchists, those arguments won’t be very convincing in the context of an argument that cryptocurrency will grow as its network of users grows.

Money is an instrument that helps us achieve our goals. In his 2011 book, "Debt: The First 5,000 Years," author David Graeber argues that while standard accounts of the history of money and transactions claims that bartering was the initial form of transaction, it’s more likely that this was not the case; credit was. Credit has always been a good medium of exchange when those engaged in the deal considered each other to be "credit-worthy", such as the small tribes in which we initially evolved. As societies grew, barter and cash, and then fiat currencies arose in response to problems of trust and reciprocity.

Fiat comes from the Latin “let it be done,” meaning that the currencies we use today, which are fiat currencies, are valuable only because they have the “full faith and credit” of the economy in which they exist. We collectively invest meaning in paper currency because a government entity tells us it is credible, saying “it shall be” currency, prints it and accepts it as the only valid form of tax payment.

So, paper money replaced trade and barter because it was a more efficient medium of exchange that also dealt with problems of trust and reciprocity. If a cryptocurrency is going to overtake a paper currency, it will have to be a more efficient medium of exchange than paper money, while continuing to deal with the problems of trust and reciprocity.

Bitcoin is a more effective facilitator of transactions than paper money. It’s more flexible, and it’s flexibility will only increase as the network grows; it’s digital, it can be used for international transactions; there are no conversion fees; and transaction fees are substantially lower. The central technology of all cryptocurrency, the blockchain, deals more effectively with issues of trust and reciprocity than a central bank. Moreover, the distributed nature of the blockchain increases the security of the currency and makes it less susceptible to manipulation or attack than a central bank. Cryptocurrencies’ major challenge is to overcome prospective users’ suspicion, and become known as a legitimate medium of exchange for legal purposes.

(Read: What Could Make Cryptocurrencies Go Mainstream)

Bullish on Cryptocurrency

In an interview with CNBC, NYU Stern Professor of Finance, Aswath Damordan, was bullish on cryptocurrencies in general, for the reasons I’ve given above. He predicted that digital currencies will eventually be as important as major paper currencies: “I think there is going to be a digital currency sooner or later that competes with the major currencies.”

Even more recently, Damordan wrote a blog post, The Crypto Currency Debate: The Future of Money or Speculative Hype? In it, he argues that the future of cryptocurrencies, as a legitimate form of payment, will have to lose some of its attributes that make it so alluring as a speculative asset. This is because the things that make them so exciting -- their price swings, their volatility, their potentially lucrative payoff -- actually make them terrible currencies. In the end, Damordan says that the cryptocurrency that has the brightest future is the one thinks about itself “as a transaction medium, and acts accordingly.”

This should effect your investments: “If you think that bitcoin will eventually get wide acceptance as a digital currency,” it’s a worthwhile investment. But, if you believe the opposite, it might be time to recognize that, “this is just a lucrative, but dangerous, pricing game with no good ending.”

So investing in cryptocurrencies might be a prudent investment, but which one that should be is a more complex question, with fewer clear answers

But, the real investment opportunity in this field might be not only cryptocurrencies, but innovative applications of the blockchain.

(For an exciting application of the blockchain, read: Polybius: A Worthy Investment?)

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