This is your responsibility to follow projects you are invested in. Bela team was tweeting very ofter about the swap. Poloniex made twitter announcement of bela delistment 7 days before. No one can take care for your money except you.
You're right, it's cryptography, and here you need to keep your finger on the pulse always. It's not an ounce of gold in your house that's not going anywhere. All responsibility is on the investor.
I agree. The Poloniex announced the removal of bela 7 days ago as a relief for investors. Encryption market is very attractive but volatile. Can not blame anyone. There is no agency or organization that manages the cryptographic market, so investors are responsible for their investments.