I realize its not exactly what you are asking, but I am following the index fund idea and so am less likely to track individual cryptocurrency values.
https://www.bitwiseinvestments.com https://www.coindesk.com/angellist-creator-naval-ravikant-backs-sp-style-cryptocurrency-fund/That said, it makes me wonder if you wanted to allow your Coin_Tracker.png image to include portfolio positions with different weights to user selected sets of currencies. I'm probably not alone in wondering (and would be happy to play the game virtually) on whether say $10K invested a year ago with different types of cryptocurrencies would have netted very different outcomes. Could I have found an optimal allocation of the investment across different cryptocurrencies to create a maximal return?
With such large volatility, anything that helps to evaluate the best investments on a given day would be a welcome tool, in my opinion. I haven't found anything that helps with that available now.