Due to severe regulatory and media suppression it will never "mature" if your definition of "mature" refers to bitcoins conversion from niche p2p cash to institutional tech stock.

If your definition of mature is a battle tested p2p cash system, it's beyond its adolescence. Upcoming FCMP update will resolve the final privacy leak and upcoming work to harden mining will resolve those unfortunate Qubic targeted attacks (attacks that are more than possible with any POW coin like bitcoin, but just don't happen because bitcoin isn't dangerous).