teens and young adults from mexico use social media to show off wealth .
they are known as mirreyes and are members of mexican high society .
one such individual , jorge alberto lópez amores , dove off yacht in 2014 .
lópez , 29 , asked friends to take video of stunt and was never seen again .
expert : ` the economic wealth mirreyes use is the main marker of class '
households in mexico take in an average of $ 12,850 per year after taxes .