This is similar to May I hold the DSLR in part by the hotshoe flash? but I'm asking about top handle. Is it safe to hold a camera that may weight more then 2kg with this? I have two lenses one is ~1.8kg and the other weight little big more than 2kg. If it matter I have Nikon d750 DSLR.
Definitely don't try to support the camera by its hotshoe. It's not designed for it.
I don't think you should put anything at all on a hotshoe. Everything is so heavy and all the weight is pushing and pulling in all directions on that little joint.
Even if your hotshoe is designed to do that, that's an insanely bad holder. Your camera is hanging off the bottom with no protection. The handle is tiny and in a terrible position. The second you pick that up, you'll understand. You'll be holding all the weight of everything with your wrist and thumb. You want a big rounded handle so all the weight is distributed and balanced and you can hold it in different positions with both hands.
Here is a proper C shaped holder. See how the holder is taking all the load for everything? The camera is not only not being used as a holder but it has a nice big plate protecting it.