How do you know Monero is excluded from the data set / which coins are included?
I doubt Monero has been excluded, but by any objective analysis of the data Monero would be an outlier. He is also comparing Bitcoin trading starting in 2010 after 1 year of hyper inflation with alt-coin trading starting right after alt-coins are release. In the case of Monero the hyper inflation of the first year is included in the analysis; while this was not included in the Bitcoin case A more apt comparison would be to wait 6 - 9 months to start measuring trading data.