Save your money in Paypal or Apple Pay and get 4.3% return
only if they are fdic insured, otherwise stay far away from them.
Or the most pristine and safe investment one can make - 4 week US Treasury bills, currently paying around 5.4%.
You can do better by simply opening up an account at Fidelity Investments and leaving it in a Fidelity government cash reserve account, currently paying 4.97%.