How does he have so much money?
Because:
His parents, Yuri Solod and Natalia Korolevska, are members of the national parliament of Ukraine.
Source: https://azcoinnews.com/rostislav-solod-19-year-old-ukrainian-politician-owns-185000-monero-xmr-bought-in-2015.html
It could be true as we don't know the real. I will let him say whatever he wants to say, but if he can not proves that he owning 185.000 monero, it is hard for people to believe it. Even if his parents are a member of the national parliament of Ukraine, it doesn't need to show or tell the public that he owns many monero amounts. If I were him, I prefer to keep that for myself because it can make him a nice target for the hacker or people who want to steal from him.