Just a few years ago Australian internet whiz-kid Daniel Tzvetkoff bought a $27 million Gold Coast mansion, drove Lamborghinis and Ferraris, flew in private jets and had an estimated personal fortune of $82 million.

But in a Las Vegas courthouse on Wednesday (8am tomorrow AEST) he will seek something most people take for granted - Tzvetkoff will ask for his freedom.

Happier days ... Daniel Tzvetkoff and his former Gold Coast mansion.

The 27-year-old one-time high-flyer has been locked up in the North Las Vegas Detention Centre since Friday when the might of US law enforcement - the FBI, Department of Homeland Security and the US Attorney's Office - swooped on him during a business trip to the world's casino capital.

Tzvetkoff's US lawyer Mace Yampolsky admits it could be a tough fight when they make their bail application in Judge Peggy A. Leen's court, with US prosecutors so far refusing to entertain the prospect of agreeing to support Tzvetkoff's release on bail.