1% of the total PRBLY supply is designated as "reserve" tokens. Reserve tokens are intended to be used strategically should there be unanticipated situations that arise or opportunities for the project to move faster with some additional capital.
Reserve tokens are kept in a Gnosis multisig wallet with 3 of 5 signers required to execute a transaction. 4 signers are members of the Probably Nothing team, and 1 signer is a member of the community. The gnosis wallet can be found here: https://gnosis-safe.io/app/eth:0xCD717F2153c765f3a6E6971b190ddfd11b86c077/home