The FDIC exists specifically so that there are not MASS runs on the banks. No need to worry as long as you're under the limit(s) in your account(s).
Make sure your account is insured: https://www.fdic.gov/deposit/deposits/faq.html
They say that the "FDIC is backed by the full faith and credit of the US Government." And they really do mean ...
Overnight bank rates dropping to a range of 0.25% to 0.00% could tend to widen the Treasury yield-curve such that longer-term Treasuries drop in price and rise in yield.
But the Fed buying of longer-term Treasuries could tend to increase the price of longer-term Treasuries which reduces their yield.
The result of the moment is that Treasury Notes and Bonds ...