Sort:  

I bought an "Alpha Vial" a long time ago. Now that they can be opened I did that. I don't think there is a use case for Zing token yet.

Zing token will the in-game currency. It's has many use cases with one of them being the currency required to upgrade the gadgets.

Currently there is nothing else to do other than to stake and earn more zingtoken as rewards until the game is launched.

For more information join the holozing discord server and ask all your doubts there. They will be happy to explain everything :)