I don't share your doubts. Even people not directly exposed to the bubble may be indirectly exposed by way of funds they've invested in or retirement accounts, or even just by having invested in something that invested in something that may evaporate with the bubble. Not to mention jobs that may disappear, which will result in the people who held those jobs being less able to spend their money, which has knock-on effects in the rest of the economy if it happens at large enough scale.