My suggestion might be more controversial than investing it into stable market funds.

$150k is an awkward amount of money. It's not enough to support you for life unless you become extremely frugal and move to a developing country. If you're under 40 invested it and forgetting about it would make your retirement more comfortable, but that assumes a stable market moving forward. The way the world is changing and the markets are behaving though, there is no guarantee of stable growth. Past performance is not a good indicator of future behavior, especially moving into the future.

Instead you could invest that money into things that will make you (and your family) more self sufficient and resilient to an unstable future. You could do things like invest in solar and other off grid tech for your home, buy acerage as far north and as close to a natural water source as you can, and many other things as well.

Obviously no one knows what the future holds but all indicators point to instability, scarcity, and generally hard times for all us little people. Guarding against that will make your life just as comfortable as letting the money grow, just in a different way