Peace of mind , The thing that comes to me when I think of PEACE OF MIND is Boston's song  Peace of Mind.. What a song , how it really speaks to what most of Us  are taught . Climbing the corporate ladder  paying our dues,, dealing with competition . Make believe their living , can't decide on who they should be.         Or the Bellamy Brothers song , Old Hippie. I Relate,  Okay maybe that song is more about Adapting and coping.  
What gives YOU peace of mind.is what matters Most. Does money guarantee peace of mind.?  No. Can money buy happiness? Perhaps, temporary, but there's no such thing as a sure thing. I know that though if you have a problem and  money can fix it, then it's " BETTER TO HAVE IT AND NOT NEED IT THAN TO NEED IT AND HAVE IT ". To change it for the better or make it go away then its good to have it.  Just ask ' Weird  Al " Yankovic . This is the life , ( put that in your address bar and search it.) seriously ; do it now. this can wait, insert 3 minute pause here, what a life that would be. Just Imagine                                                                                                                                                                           

https://m.youtube.com/watch?v=P9LJRvMJu60

Also; here is the you tube link for Weird Al" video, "This is the life". If it seems familiar , it's the opening song for the movie " Johnny Dangerously" , So Fargen Funny !
https://www.youtube.com/watch?v=N1n5XqwUkYw

Check out this 40 year old song
​https://www.youtube.com/watch?v=-gz-kj8NXCA