I'm not sure what kind of scenario you're imagining here. If 10% of all deposits and 0% of all bonds (which generally take haircuts before deposits) are suffic

I'm not sure what kind of scenario you're imagining here. If 10% of all deposits and 0% of all bonds (which generally take haircuts before deposits) are sufficient to keep the bank afloat, the alternative is not 100% of all deposits and 100% of all bonds. The alternative is a larger portion of bonds and a smaller portion of deposits.