Every time I finish losing money and, feeling defeated, enter a moment of zen, this Spirited Away theme song comes to mind.
1 Hour Spirited Away OST The Name Of Life Piano C Excellent Quality
Although I've only seen the anime once, this piece gives a sense of life being transient and many things not really mattering—it fits the mood.
If for some reason life has hit rock bottom, I'll instead listen to Beethoven's Ninth, Rachmaninoff's Second Piano Concerto, the Moonlight Sonata, and other classical pieces.
If I want to give myself a bit of an excuse, I'll listen to Don't Look Back in Anger.
I'd also like to see what everyone else shares.
If you're still feeling raw after a loss, don't rush to push through it with music. Instead, set a short window for yourself—say, listen to one track, then close the account page, step outside for ten minutes, and come back to it. This assumes the loss hasn't affected your essential living expenses; if it's already putting rent or loan payments at risk, sort out your positions and budget first before worrying about what to listen to.