Never, ever, put all your eggs in one basket.

This year’s been a real grind for Luckin Coffee LK, 36.05% investors.

At one point, Lone Capital held $367 million in stock to lead all hedge funds covered by Insider Monkey. DSAM Partners had $146.2 million worth. Melvin Capital, Renaissance Tech and Tybourne Capital were also bullish on the company, according to Yahoo Finance.

So when the stock, which was already down 89% for the year, had its trading halted back in April amid an investigation into financial misconduct, the losses were felt far and wide. 

But one retail investor with a PG-13 Reddit name took a particularly grievous hit.

Yes, StopFapForever, who claims to be a 28-year-old Italian, shared his brutal market mistake with the bunch on WallStreetBets. He apparently he went all-in on Luckin and lost his entire life savings in the process. “Now I’m broke af,” he wrote, posting this screenshot of the carnage:

First, that's not a bad life savings for a 28 year old. Either he inherited a lot of it, or he'd had some success in the market before that made him arrogant.

Hubris, then nemesis. That's how it works.  If you live long enough, you learn that lesson well, but hopefully just once.