That a 13 yo recognizes the 'cool' aspect of a bent is reason enough to get him one, if the money can be found. Especially if there is a way for him to earn part of it. Likely he'll quickly appreciate the collateral benefits and never want another df.
Sure, stuff could happen to it. He'll likely crash more than once. He'll also probably crash his first car. Two of my kids did. That's life.
As for it being stolen, far less likely than a df I'd think, and a lot easier to find should it be fenced.
Good luck.