Lol....it's not that bad I hope. However CS is a very large correspondence banking provider also. I can think of one bank off head that switched over to CS as their main correspondence banking provider in the last few years. Medirect in Malta is the one
. A CS trading halt could impact access to most currencies for them or cause liquidity problems for their operations. They use a Euro nostro account at CS as their default Euro payment account also rather than their direct connection to ECB also
.
https://www.medirect.com.mt/wp-content/uploads/Correspondent-Bank-Network.pdf
Now magnify that by the many banks around the world that also use CS for correspondence banking and you could end up with a short lived liquidity crunch globally, failed payments, credit defaults etc if a smooth bail-in does not happen
.