I remember a long time ago, on a talk by Benoit Mandelbrot, who visited my university in what may have well been a "Farewell Tour" that towards the end he says

I remember a long time ago, on a talk by Benoit Mandelbrot, who visited my university in what may have well been a "Farewell Tour" that towards the end he says: but the only "practical" application is gaming financial markets, and proceeded to talk about his work in this area; or something like this, my memory is a bit vague. I remember feeling disappointment.