Ultimately it depends on what you want to do with the DEC down the line. If you plan to sell it, I still think it's more valuable to buy now, expedite the flywheel, and the sell higher later.
But I personally wouldn't want to exit DEC at all. At least not this quantity. I'd rather use it down the line to fund the DEC liquidity pools so we can remove the SPS LP rewards and cut SPS emissions (because we have to do that anyways at some point).
Of course that is all a separate debate that is for another time. I think it's best to just hold the DEC for now to keep it off the market and reach par faster.
RE: DAO Proposal: Swap DAO BUSD and USDC/T For DEC