I honestly don't remember how much I "lost" October 6–10, 2008 or February 24–28, 2020. I certainly won't remember how much I "lose" in the next crash.
What I do know is how many shares I still hold of a broad range of companies with a track record for growth today and how much they've collectively risen in value between October 5, 2008 and May 11, 2024.