People became the fastest billionaires in the shortest amount of time

Bobby Murphy – 3 years

Snapchat co-founder Bobby Murphy achieved billionaire status in 2014 as well and, like his colleague Evan Spiegel, made it on to the Forbes World Billionaires list for the first time in 2015, rocking a net worth of $1.8 billion (£1.4bn). Murphy's fortune has since grown to a very respectable $4.8 billion (£3.7bn).