The big jump occurred when Ballmer paid $2 billion for the Los Angeles Clippers in 2014. Despite being a historically terrible franchise that is the third team in the city behind a) the Lakers and b) whatever team that you were already a fan of before moving to southern California, the price was four (!) times as much as what any previous NBA team sold for.
It's unbelieveable, especially considering their values 10 years ago. Brooklyn Nets were acquired in 2010 for $200m, and then sold in 2019 for $3.3b - 16x more in 9 years!
You know the market is overvalued when an iteration of Runescape gold is "worth" multiple trillions.
You're laughing now, but you'll sing a different tune when you want to get your rune armour trimmed