If you had $800 million in cash, and you could either deposit it with the central bank and be paid -0.5% interest, or invest it in say, a 12-month Apple corpora

If you had $800 million in cash, and you could either deposit it with the central bank and be paid -0.5% interest, or invest it in say, a 12-month Apple corporate bond at 0%, what would you do? Note that attempting to hold onto the cash in a vault has real costs as well.