Coinmarketcap Home Page

Cryptocurrency Index

Coinmarketcap ( is the best known and most important of  the index providers. It aggregates information from many markets to get the instantaneous price of any coin or token. In January 2018 it sparked a run on Ripple when it removed South Korean exchanges from its calculations because of market anomalies.

Disciples of the CrytoIndex Guru are less interested in the price of single coins than they are in asset allocation. Coinmarketcap’s Global Charts page shows the total size of the cryptocurrency asset class and the market dominance of Bitcoin.

Coinmarketcap gives us the total cap.

The first asset allocation we are interested in is between non-crypto (stocks and shares) and crypto. This can be measured by considering the total value of all cryptocurrencies.

As index investors we follow total market capitalization closely,

  • If money flows in, demand increases and prices will rise – higher cap
  • If money flows out, demand decreases and prices will fall – lower cap

This chart shows the increasing size of the cryptocurrency market during 2017.



Coinmarket cap total cap

Bitcoin versus Alts

The second asset allocation we are interest in is between Bitcoin and all other cryptocurrencies (Alts). There are three possible investment positions


You will follow an index that contains cryptocurrencies according to their market cap.

Bitcoin Positive

Your portfolio will contain more than the percentage market cap of Bitcoin (33% at the time of writing). Some investors believe that in the long term Bitcoin will replace gold and other cryptocurrencies will fall away.

Bitcoin Negative

Your portfolio will contain less than the percentage market cap of Bitcoin. Most commercially provided indexes cap the amount of any one coin, often to 10 or 20%. It is often thought that “elephants don’t run” and the gains to had in smaller cap assets are greater over time.

This chart shows that during 2017 the total market value of alts exceed that of Bitcoin for the first time.




James Bayley

Ex-physicist, professional project manager and cryptocurrency enthusiast.

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This site provides educational material only and nothing herein constitutes investment advice. You must conduct your own due diligence before buying any cryptocurrency related product and should consider taking professional advice.

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Cryptocurrency investment is very risky and you may loose all your money. Risks include but are not limited to, theft, fraud, exchange failures, and technical errors leading to partial or total loss of funds. Never invest money you cannot afford to lose.

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