If you had $500 to put somewhere for short term hold (high risk high reward), where would you put it?

I only invest in low cost ETFs, but seeing this bull run I want to play around with $500 which is a really small amount of my NW.

Looking at Carvana, I feel like I should bought when it was under $10 and ride it out. But hindsight is always 20/20.

What would you gamble on if you had $500?