NFAIV2

In the contract `NFAIV2` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and perform, including but not limited to, the following operations: - Include/Exclude any address from trading when trading is not active. - Enable trading if it was not yet enabled. - Transfer all ETH held by the contract to any receiver. - Transfer all tokens held by the contract to any receiver.  In the contract `Ownable` the role `_owner` has authority over the functions shown in the diagram below. Any compromise to the `_owner` account may allow the hacker to take advantage of this authority and transfer or renounce the ownership of the contract. 

All of the `NFAi` tokens are sent to the contract deployer or a wallet indicated by the contract deployer when deploying the contract. This could be a centralization risk as the anonymous deployer or the wallet indicated by it can distribute tokens without obtaining the consensus of the community. Any compromise to the deployer account or the wallet indicated by it that holds undistributed tokens may allow the attacker to steal and sell tokens on the market, resulting in severe damage to the project.

The change of `owner` by function `transferOwnership()` overrides the previously set `owner` with the new one without guaranteeing the new `owner` has the ability to actuate transactions on-chain.