Sort:  

Good ones.
I think protection of funds will be secured by Hive engine p2p system, as with it's implementation it is difficult to hack.

Having a P2P network doesn't protect you from hacks. For example on ethereum there have been several instances where DeFi projects have lost millions.

In this case if you buy a share in a prediction market you have to send Pal to an address. How are does funds protected? Who controls that account? How can we verify that?.

Those are the questions.

The funds are held in an escrow account and the system uses active authorities to trigger contract transfers automatically without exposing keys beyond the necessary dev setup.
The code is not currently open source.

Since Hive-Engine has now gone DPOS it would be cool to use those features :P