I simply wanted to point out that you cannot cherry pick the time periods. Right now on a 6-12 month timescale bitcoin has been absolutely terrible investment.
You are right that transactions that remain within Bitcoin do not incur transaction fees. However those transactions do not include the big merchants, which you did use as an example. So yeah you can give bitcoins to your friend without a fee but you cannot buy anything from a shop that 'accepts' bitcoin in practice without a fee.
The annual revenue of the merchants in those slides is the total annual revenue. There is no mention whatsoever on how many purchases they have that is being made with bitcoin. So it's useless data in that sense.
Do you happen to have any data about the purchases made specifically with bitcoin?