I have no problem with comparing fiat numbers. I have a problem with purposefully picking the lowest point of any time for monero and going from there.
I could have just as easily said since Jan 1 2018, Bitcoin is up 5x, and monero is 50% lower.(Didn't look, just roughly).
Over the past 7 years, monero hit it's high as all coins do in both BTC terms and fiat. Ever since, it is down in fiat, and trending towards zero in BTC terms.
I'm not getting into a xmr vs BTC debate here, just pointing out the starting points.