Minerals in Irrevocable trust

Overcharged for sure, mismanaged undoubtedly. It’s hard to believe that in 41 years, we have only accrued less that 1M in that trust. Our projected return for this year is only 1.98% and that includes our oil income! Like, what are they doing to get so little return?? I could get 3% if I ONLY invested in CDs and charged no fees to the beneficiaries!! Are they handing money out to THEIR relatives or what??? Watch out for large, US Banks.