Put it simply: you leave your Unify wallet open and wait for rewards while at the same time you’re helping to maintain the Unify network. This system proofs to enable more transactions per second and PoS currencies are a lot more cost efficient. There is no mining, no need for expensive computer equipment and therefore no fear for a large electrical bill.
So you can help for Unify Network.
If you have lots of coins or a relatively significant amount invested in crypto, make sure you apply sufficient security measures to protect your wallets. One important thing would be to not store all your coins on the same computer that you do all your daily stuff with. There are key loggers everywhere, and you might wonder one day when your wallet is empty out of a sudden.