Off-Topic Next bike after rm 85 small wheel for my kid.

My 12 boy is 5’6” at 160lbs and just sold his rm 85 small wheel. He’s a pretty aggressive rider on trails and just getting comfortable jumping. He starting to bottom out suspension and wanted to sell so we did. Question is should we go straight to a 125 or get the big wheel 85 or 150rb. I feel he would put grow the 85L to fast.
seems like every 2 years he’s need new bike.
he started on crf 50 then ktm 50jr, ktm 50sr, kx 65, rm 85. We ride in our back yard some of the time but and tracks a few times a year.
FYI he can start my cold blooded 2002 crf 450 so he thinks he’s ready for 125 lol!
what do you guys think?

Thanks that’s what I’m thinking as well.