Where to stash $725,000 while the stock & bond market crashes this year?

As per the title. My IRA is currently with Empower and I've lost $17,000 since Jan 1st. I'm thinking a savings account with 3.75% apr is better than what the stock & bond markets will do this year. We are 66 & 72 years old and both retired and live comfortably on social security and a rental income so we don't need to dip into our savings for the foreseeable future. Last year I had a 38% return which I was pretty happy about! I have another $450,000 in various savings accounts. Any recommendations are appreciated.