Is the Johan Cruijff Schaal interesting to bet on?

Absolutely. It is a match that is a test for everyone, including the bookies. The form of the day and will to win often say more than which team is strongest on paper. Also, it is sometimes a match between two teams that also met in the cup final and/or fought for the championship. If you look at the results, more than once it led to a surprise or unexpected result. In other words, plenty of opportunities to make valuable bets.