That's going to go down as either one of the biggest blunders of the early 21st century, and if not, it will be a near miss.
He's never getting his money back. He's never getting his credibility back. He's never getting his supporters back.
He has passed the zenith of his life and all that is left is the long slow march to obscurity.
The market is full of idiots. Remember when TSLA did a 5x stock split and then hit the exact price from before the split, effectively increasing value by 5x for no discernible reason? That was about as rational as the value added by the hard fork to BCH (when anyone holding BTC instantly got the same value of BCH, which shortly became tradeable on Coinbase, during a time when IIRC some Coinbase employees were later charged with insider trading).
Anyway, the market will go up again, and it will probably go irrationally high. After all, that's what's always happened... ;) ... So, Twitter will benefit from this, pretty much regardless of their actual revenue - if anything, the $40bn Musk paid for it will serve as an anchor for the IPO, meaning it will be almost definitionally unlikely to go public for less than Musk paid for it, assuming Twitter can survive long enough to credibly go public.
That was likely Charlie Lee and LTC, not BCH.
It may not be all that slow.