The example 2 in section 2.1.2 is curious. It essentially says that the value of goods purchased with bitcoins is determined by the eur-btc exchange rate at the time of purchase. I find that idea problematic because there afaik is no official exchange rates for bitcoin.
What I find curious is the asymmetric handling of realized exchange rate profits vs. losses. Profits are taxed as capital gains, but unlike with e.g. shares, you can't use realized losses to offset the profits.