I would like to programmatically get a complete list of the historical:
- Number of transactions
- Average Transaction Fee
- Mining Profitability
- Block Time
- Block Size
related to the major cryptocurrencies
There is https://bitinfocharts.com/ although I see not API so you would have to crawl it. If you are missing coins you would need to create a list of these and look up their individual block explorers. Usually every coin has one but I do not know of a single place where all the hundreds of coins stats are kept.