Where is everyone parking their excess cash?

The last few years I’ve really been getting my finances together. I opened a Roth IRA 3 years ago and have VTI, VXUS, and a bit in BND. I stupidly had 100k in a regular savings account for way too long.. and the beginning of this year I opened a HYSA at 4.25%. Is it worth locking in a CD at 5.10%? Or looking into treasury bills when my cash is already getting a hefty interest rate while still being liquid? I recently opened a personal brokerage account with the same place I have my Roth IRA and was thinking of putting a good chunk of change in some more ETFs since they give a way better return long term.. what’s everyone’s thought? What are yall doing with your money??