This week I have given three presentation about the basics of money and different monetary systems. Herewith the slides that I used at Bitcoin Wednesday at Pakhuis De Zwijger. More and more I think that we need a debate and a democratic decision about what kind of money or moneys, and what kind of monetary system we want to have. Fortunately the scope and scale of the debate is changing slowly; more fundamental questions are asked and more people get involved. If you want to participate in this debate, on September 2oth there is a large conference Geld voor de Toekomst at the Erasmus University (Rotterdam). I think it will be an interesting day.