And naturally, the youngest of all the billionaires on this list is Bobby Murphy’s partner in crime – Evan Spiegel, who is even 2 years younger! If someone told you that a 24 year old would be running a $19 billion company with another 20-something guy, you’d laugh at their face. But, such is life – crazy and unfair. At least he didn’t sell SnapChat to Facebook for $3 billion, now that would be a bad deal.