No my partner managed to lose more than 100000 usdt in sfx.
my thoughts on holding usdt are it is supposed to be 75% backed by US t-bills
so why trust usdt you may as well trust t-bills and cut out the middle man.
t-bills pay half assed interest but if it is a small amount of btc you cash.
10percent of your coins in your case seems okay. t-bills are pretty safe.
I have I bonds and silver and a lot less btc than you.
plus the home is paid off.
I get what you are saying (no mortgage), but the house is NEVER paid off.
My RE taxes roughly equal the sum of mortgage (per year).