For an investor to be able to know on which crypto coin it is best to invest, an individual must track first the market cap of the cryptocurrency he wishes to invest with so that he can better know if it will be worthy to invest on it or not. Since you are aiming to gain profit from doing investment, the first thing you must do is to of course familiarize yourself with the crypto you are aiming at. Not doing such is like putting your funds into a gamble for you are risk taking and taking probability of whether you gain or loss on the investment you are doing. As an investor, aim to make profit while you lessen the chances of experiencing loss because you cannot totally eliminate the chance of loss for it is just normal most specially at this kind of market that is volatile.

Bitcoin and the crypto world were created to facilitate money transfer transactions throughout the world.  Due to the speed of data transmission and the difficulty in creating cryptocurrencies, it is highly valued.  To analyze crypto volatility, of course you need to have time to analyze the charts, the coin market cap is an overview.  but it's better if you log into some of the big exchanges, such as Binance.  and the most important thing is that you must know the strategy to get profit from the crypto world, because with fast fluctuations, it will result in a big risk.

It bitcoin, most of the whales, big companies, and people are eyeing not from the market price, for now, they are looking for long term gains in bitcoins which could be achieved by looking at the market cap of it. We are nearly getting into trillion in terms of market cap, that is huge and that assures that many people are already trusting bitcoin for transaction and savings, thus this demand will be the best asset bitcoin has, even if its technology stick to the traditional blockchain, as long as it keeps functioning very well, many will still trust BTC.

Same for the other cryptocurrencies out there, the more market cap they have, the higher the ranking they will be placed on cryptocurrency boards such as coin market cap, meaning, more investors will get into it.

Understand first where I am going to invest. That is why investment should be made there. Cryptocurrency is everything in a state of flux. Investment should be made very carefully here. I should invest half of my financial capacity. A new project that I like very much is Dabby Finance. Hopefully its future can be very good.The team is very good in this project and its potential is very good.
These are the best things to consider without judging me

Investing in crypto means you expect a nice growth of the value from your crypto.
The value of your crypto can grow nicely when it has a good supply and demand.
It will determines how liquid is your crypto. Crypto with big marketcap has a good liquidity.
In a nutshell, you will be easier to convert your crypto into fiat money when you invest in a big marketcap crypto.
Marketcap also representation of how investors see that crypto. Big marketcap = investors see it as a valuable thing.

Cryptocurrency, with lots of opportunity and lots of risk. It is not that market cap is not a helpful cryptocurrency tool, it can be. But it is  important to recognize and understand how to compensate for these risks that cryptocurrencies come with risk factors. It is an extremely interesting and dynamic development. If you are going to invest, understanding how it works is important.

Before I take a Trade on BTC EUR I always check the Market cap with this fine tool right here https://de.tradingview.com/markets/cryptocurrencies/global-charts/
Enjoy!