You are referring to distribution, not security. Remember Satoshi's design for Bitcoin provided distribution and security with PoW. BitNet's security is orthogonal to its method of distribution of tokens.
Did you see the system they did with nubits/nushare ? Seemed to get in that direction to separate monetary unit from décision power with 2 tokens.
https://www.nubits.com/nushares/introductionNuShares are units held by individuals who wish to help support and maintain the Nu network. Owning NuShares is not required to use NuBits. Instead, NuShares are intended to be a source of network equity for developers, entrepreneurs, and speculators. NuShareholders can receive network revenues in the form of Peercoin dividends paid out by a custodian.
What can NuShareholders vote on?
There are several actions NuShareholders can vote on. The actions to vote on are Custodian votes, Park Rate votes, Motion votes and Transaction Fees. NuShareholders will be able to vote on these different network actions when a block is minted. By setting their vote in the client it will be recorded into the blockchain each time they mint a block. The purposes of these categories of votes are to select custodians to maintain the network, choose interest rates for parking, make decisions on the development of the network, and determine how much using NuBits should cost a user.