Let's begin by stipulating that speculation (i.e. gambling) is part of human nature. The role of regulations and policy is to limit the damage that gambling inevitably inflicts when "sure things" cliff-dive into losses.
In other words, where the speculative frenzy and money flows matters. When the South Sea Bubble expanded circa 1713-1720, this flood tide of speculative capital did not distort the cost of shelter and bread in England; it was limited to a purely financial marketplace of shares in the company. When the bubble imploded in 1720, the losses fell mostly on wealthy investors like Isaac Newton.