There are several popular cryptocurrency portfolio trackers that people use to keep track of their investments. Here are a few examples:

1. Blockfolio
Blockfolio is a mobile app that allows you to track your cryptocurrency portfolio and receive price alerts. It supports over 10,000 cryptocurrencies and is available for both iOS and Android devices.

2. Delta
Delta is another popular portfolio tracker that supports over 6,000 cryptocurrencies. It offers a range of features, including price alerts, news updates, and portfolio analytics. Delta is available as a mobile app for iOS and Android devices as well as a web app.

3. CoinTracking
CoinTracking is a web-based portfolio tracker that supports over 8,000 cryptocurrencies. It offers a range of features, including profit/loss calculations, tax reporting, and trading analysis. CoinTracking also integrates with several popular cryptocurrency exchanges.

4. CryptoCompare
CryptoCompare is a web-based platform that allows you to track your cryptocurrency portfolio and receive price alerts. It supports over 5,000 cryptocurrencies and offers a range of additional features, including news updates, mining profitability calculators, and a community forum.

5. CoinStats
CoinStats is a mobile app that allows you to track your cryptocurrency portfolio and receive price alerts. It supports over 8,000 cryptocurrencies and offers a range of features, including news updates and portfolio analytics. CoinStats is available for both iOS and Android devices.

These are just a few examples of the many cryptocurrency portfolio trackers available. Whenchoosing a portfolio tracker, it's important to consider factors such as the number of cryptocurrencies supported, the types of features offered, the user interface, and the overall reliability of the platform. It's also a good idea to read reviews and compare different options before making a decision.