“But everybody's like cristal, maybach, diamonds on your time piece.
Jet planes, islands, tigers on a gold leash”

Lorde – Royals Lyrics on LyricsMode
Everyone today cares about money, without looking the real meaning of life. Lorde is trying to say that she'll never become one of those people.
Cristal is an expensive Champagne.
Maybach refers to a make of extreme luxury cars, now out of business.