{-- BONUS -----------------------------------------------------------------
Okay, now that you have these data, plot the BitCoin price over time.

Question: is there a mean gain over the year? Answer: yes.

Question: does a mean gain curve make sense with the fluxuations in BTC prices?

Let's see.
--}

chartBTC :: FilePath -> BitCoinPrices -> IO ()
chartBTC outputWithMeanGain btcprices = undefined
chartBTC :: FilePath -> BitCoinPrices -> IO ()
chartBTC outputWithMeanGain btcprices = undefined
chartBTC outputWithMeanGain btcprices = undefined