Answer: An accounting programme that allows you to value and monitor your cryptos.
In your portfolio, you can fictionally track the value of your cryptocurrencies. You can enter which and the number of cryptocurrencies you own. Because this is a fictitious programme, you can also enter cryptos from an external wallet. With this tool, you can see the value and any profit that you have made at a glance.
Please note: The portfolio is merely a programme for checking the value of your cryptos. This means that you yourself determine which and the number of cryptos you add. If this is incorrect, your portfolio will not match the actual value of your cryptocurrencies.