Sidenote: they closed Silicon Valley bank and ALSO the Signature bank, apparently (Silvergate closed last week).
Is there any bank left for Coinbase and Kraken to bank with?
I am not sure.
Coinbase have 5 other banks I read, SVB was just one of six. Probably why USDC is back to $0.99 before their banks open tomorrow despite you expecting much less than that. Not sure about Kraken, but doubt they'd be dumb enough to only be working with one bank, but time will tell. Generally speaking, major exchanges don't partner with only one bank for this exact reason... At least this isn't 2017 anymore.
Regional banks might bounce up tomorrow, but then it might be like Lehman after it bounced up after Bear went under....same problems.
I think we're yet to learn about the contagion regarding SVB, given it was near the size of Lehman, but the involvement in financial sector was considerably different it seems - mainly tech start ups, rather than general purpose (unless I'm mistaken here). The interesting dynamic will be to see if this situation will end up being "good" for Bitcoin or not, the idea that centralised banks aren't a reliable place to store wealth, hint hint...
The Times 03/Jan/2009 Chancellor on brink of second bailout for banks
If Bitcoin continues to rebound strong, it'll be predicatable to look back in the near future and claim the reason why, based on the one of the reasons for Bitcoin's existence.
Likewise if Bitcoin drops further, many will point figures to the SVB situation as reasonining, for example if USDC fails to return to parity.
It's almost as if Bitcoin has a mind and sentiment of it's own and external financial situations doesn't affect it

At least so far from the SVB fall-out, Bitcoin has bounced from support and up 6%... just food for thought.