I'm against buying DEC as it's tinkering with tokenomics inside the economy again.
As boundaries around this shift often, I don't like placing DEC as "the most important asset" right now. One-two more years and we may have some source of DEC inflation again, because reasons.... And DAO gets stuck with DEC bought under outdated assumptions.

I would be voting for swapping BUSD for BTC - or better use BUSD to fund the Rebellion proposal -> Team can cash out and put it to good use. Keep the other stables in the DAO.