A few things I learnt that have helped me a lot over the past few years include:
1. Don't invest into anything where you're relying on a third party exclusively.
2. Don't go all in.
Regarding 1, this was back in the day that these ventures had their shares on centralised exchanges. I remember that after two exchanges went down the toilet I lost access to the shares and from that point onwards had no control.
These days I only touch ventures that I know I can trade in a decentralised manner (such as ERC20).
I am really sorry to hear you rode this into the ground. I thought you were one of the people actually listening to my warnings.