You can find historical crypto market cap and crypto price data on CoinCodex, a comprehensive platform for crypto charts and prices. After you find the cryptocurrency you’re interested in on CoinCodex, such as Bitcoin, head over to the "Historical" tab and you will be able to access a full overview of the coin’s price history. For any given coin, you will be able to select a custom time period, data frequency, and currency. The feature is free to use and you can also export the data if you want to analyze it further.