If everyone was to do this it could work temporarily, but it would cause problems in the future. By sending grain to yourself you reset the coinage and delay the minting process of those coins which means less coins fighting for PoS and in return PoW should find more blocks. But once those coins are up for minting again we would run into the same problem. Imo the best option for the coins short term health is to change the PoW extended time from 12x down to 3x for the instant results.