An passive investors are going to get hosed by this thanks to NASDAQ cooking the rules to favor Elon and his band of misfits. No longer will there be a year of price discovery for index funds, 15 days. Meaning index funds have to buy it at the peak of the hype cycle. Will be a huge wealth transfer from mom and pop retirement accounts to the ultra wealthy.
Seems like MSCI can add new large constituents very quickly as well [1], so to remain neutral to the frenzy until a price has been discovered, one might need to actively short.
[1] e.g. https://www.msci.com/eqb/methodology/meth_docs/MSCI_GIMIMeth...