Just turned 60, office job in North America; what are the next steps

I've had an excellent job for 25+ years with no layoffs or downturns. I've a house on the ocean, a house in the mountains, a condo in town, no debt whatsoever, and investments that are 10's of millions of dollars. I've put my life savings in low risk index funds and have taken no losses yet. What steps should I take now to further shield my money from the market?