(Bloomberg) -- On the surface, Charles Schwab Corp. being swept up in the worst US banking crisis since 2008 makes little sense.Most Read from BloombergSaudi National Bank Chair Resigns After Credit Suisse RemarkBinance and Its CEO Sued by CFTC Over US Regulatory ViolationsFirst Citizens to Buy SVB After Biggest Failure Since 2008Stocks Rise as Banks Sigh in Relief; Bonds Retreat: Markets WrapThe firm, a half-century mainstay in the brokerage industry, isn’t overexposed to crypto like Silvergate