Fedor Holz is a semi-retired professional German poker player who mostly stepped away from the game in his late 20s in order to build a career in investment using his winnings. At first, he was primarily known as an online poker player, going by CrownUpGuy on PokerStars.

Holz was something of a prodigy, with his fame peaking in his early 20s. He won the PokerStars WCOOP Main Event in 2014, aged 21 and his first WSOP bracelet two years later. By that time, he was already playing high roller events almost exclusively.

Since 2020, he has been a brand ambassador for GGPoker.