There have been much larger diamond hands scenarios.
A Japan dotcom bubble billionaire, Yasumitsu Shigeta, went from $42 billion at the peak in 2000, down to $600m by 2009 as his shares of Hikari Tsushin (mobile phone distributor) sank. Still extraordinarily rich, however that's a remarkable $41 billion decline. He went from being worth $1b to $25b in one year in 1999.
Masayoshi Son rode Softbank down by something around $75b after the dotcom bubble. Softbank lost 98% of its stock market value.
There were obviously a lot of billionaire wipeouts during the US dotcom bubble as well, as people held and sank, although none quite as dramatic as those two declines.
At the very least you could create a commemorative diamond hands NFT collection and walk away with a few million.