That 928 has been a better performer than your 401K I suspect. Roll that puppy into a new IRA and figure out how aggressive you want to be. Actually I don't think you can open an IRA with that much money. I hing it is limited to 7K per year at your age. You will want to put it in some for of investment. I know by Tesla shares with it!
It will be a good bump to your retirement savings.