Why should anyone care? The game of how much billionaires are worth is an often silly exercise that nonetheless matters a great deal to the absurdly wealthy , even when it typically involves irrationally large sums that have little practical day-to-day value. Still, it's fun to play along, especially when it involves Bloomberg , who is considering a possible presidential bid to topple Trump, the reality TV star who may or may not be worth quite as much as he claims .