[M]32years old hook-up partner proposed me [F]21 for marriage and I’m confused af.

There’s this guy, handsome and quit rich(I’m not a gold digger, I believe in being self dependent).
He is European and I’m Indian.
We met the first time almost 4 years ago, through fetlife(in short it’s an online platform for different sexual explorations), and whenever he used to visit India, we used to meet and all.
And we did had group stuffs with his cousins and others as well.
Now the thing is, for my pg I’ll shift to Europe quite soon, and fortunately in the same country as well from where he belongs.
Suddenly out of nowhere yesterday(we are in hongkong at this moment, for meet) & he asked me if I’ll love to marry him?.
I’m confused now. Reasons
1. Right now my real concern is to focus on my career. And his argument is, that he’ll not disturb my studies, in fact he’ll support as much as he can. And a obvious reason is, I can boost my career with the help of his firm.
2. Both of us are in sexual explorations, so we had been with (way many) multiple partner, and he had been married twice till date. But he is like “he hadn’t met anyone like me”. And the exploration will not stop even after marriage. TBH I don’t have any issue with it.
3. The age difference, I’m just 21 now, where as he 32 at the moment.
Family is not an issue for me.
Now one part of me want to marry him asap, on the other hand, the other side is concerned.
I don’t know what to do, suggestions are appreciated.

Source: reddit.com/r/gonewildstories/comments/tf8pmb/m32years_old_hookup_partner_proposed_me_f21_for