'Also it should be borne in mind that this kind of activity isn't really making any constructive or lasting contribution to society. It's really just moving mon

'Also it should be borne in mind that this kind of activity isn't really making any constructive or lasting contribution to society. It's really just moving money around slightly more efficiently than previously. If you really want to change the world, do something else.' I agree completely. While have reasonably efficient capital markets is necessary for society, its very hard to show that the marginal improvement offered by this kind of activity justifies the massive amounts of effort that go into it, just because: 1. It's cool. 2. It can make a lot of money. But unlike making money out of making something people want (e.g. providing value), here you're making money (if you succeed) out of very small market inefficiencies that are probably not hurting anyone, or even just by being 1ms faster then the other guys who were already catching them anyway,