Is GTA 4's Niko Bellic dead?

Many GTA 4 fans wonder, "Is Niko Bellic dead?"

Roman Bellic GTA 4 Characters, Bio & Voice Actor (GTA IV, TLaD & TBoGT)

Niko Bellic

10 Worst Things To Happen To Niko Bellic In Grand Theft Auto 4

Niko's Death in GTA 4 The Sad Ending

GTA 4's Worst DLC is a Red Dead Redemption 2 Speedrun

Video games: the addiction, Grand Theft Auto

GTA 4's Ending Choice Isn't As Hard As It Thinks

Niko Bellic, GTA Wiki

Grand Theft Auto IV: The Complete Edition on Steam

Please Don't Let GTA 4 Rot on PS3, Rockstar

Grand Theft Auto IV (Video Game 2008) - Michael Hollick as Niko Bellic - IMDb

Which decision do you think makes the most logical sense for Niko to make at the end of GTA 4? : r/GTA

Grand Theft Auto IV: Special Edition Review - IGN