Iceberg

https://www.forbes.com/advisor/banking/ways-to-insure-excess-deposits/

Here are some of the most common strategies if you're over 250k. But at 100M it would be very foolish to not invest (likely hiring a private wealth manager to do so competently).

I prefer shoveling snow (and snowblowing). Takes about half the time of my yard and is only about 10-12 times all winter in my area. My yard is usually every 4-6 days.

Pesto noodles with chicken Apple sausage and grape tomatoes. All available at Costco! Can modify to remove sausage for vegetarians or add arugula if desired