@PropertyManager In her other posts OP said she has assets of her own (which she feels are possibly similar to his) and he does want marriage and children as well.
She also stated he volunteered the information she mentioned in her first post.
I would not go as far as to say that some commenters have made her out to be a "gold digger," but only he knows whether he has a combination of a sufficiently substantial net worth, abundance of caution and/or negative experiences to be very much weary of marrying someone society would likely deem a gold digger -- neither OP nor people here can answer that question.
Irrespective of OP's situation, most wealthy people (all sexes & sexual orientations) who are in a relationship with a real gold digger tend to be aware of the implicitly (or even explicitly, depending on circumstances) transactional nature of their relationship -- so sometimes what is usually considered inappropriate in the early days of dating does seem to be given heavy consideration.
OP, however, has remarked this is not the case.
Previous commenters have already brought up concerns regarding age, parenting expectations and potential life philosophy differences, so I won't go into them.