I think that's a good fair point I hadn't considered before really. Many of these coins with small to mid "market caps" on cmc are probably worth a fraction of the reported value. I don't think it necessarily applies to the larger cap coins though. If you remove the "other" from the chart it's still a fairly major chunk of dominance that has shifted.
The whole thing is just stupid. I could create a shitcoin today with a trillion coins (which I pre-mine 99.99% of them), wash trade one coin on an exchange for $1, and voilà my shitcoin has a $1T market cap and be #1 on the cmc listing.