Hi Daveyjones, thanks for your kind words. Your quantitative probabilistic method is interesting, it reminds of the method presented by Nicolas Nassim Taleb in his famous book "fooled by randomness". Of course the challenge is that any "number" put on "probability of success/failure" would be subjective and therefore the end result "take the bet or not take the bet" would differ from one person to another depending on his initial (always biased ?) assumptions about "risk of failure/probability of success" so here we are on square 1 again. That is why the way i see it is that these "binary investments" a la MZI are best to be played from a qualitative analysis point of view.