It's not 4 years old or 3 years old, it's a little over 1 year old. It was originally launched as PepeGold back in March 2018 and has had several swaps/rebrands since then. See here: https://bitcointalk.org/index.php?topic=3045622.0
But the website says 4 years old and another ANN of theirs which i screenshoted says 3 years old and now it's one year old. So which is which? Why are they not clear of the exact history? Check the website for yourself