Normally, there are two states for a wallet:
- locked, where it is protected against theft with a password but cannot stake
- unlocked, which is the opposite
Unlock for Mint is yet-another exclusive function of HyperStake which allows the wallet to stake and be protected. Best of both world? Not exactly. When the unlock for mint function is enabled, the wallet unlocks itself for receiving the reward ("minting") then re-locks itself. So, during the brief minting moment, it is still vulnerable. But at least, it is only vulnerable at this moment.
This is a must-have for most people. The only reason to not activate unlock for mint is if you do not want to set up a password or are afraid of losing it.