I was thinking the same thing, except a rock. I frequently visit ships as part of my job, and it would be no problem dumping it somewhere it would be likely to remain undisturbed for the rest of eternity. A grain if sand is likely to move with the currents. A rock will not.
A grain of sand, dump it in the ocean
But then your loyal servants won’t be able to find it either to bring you back.
I was thinking the same thing, except a rock. I frequently visit ships as part of my job, and it would be no problem dumping it somewhere it would be likely to remain undisturbed for the rest of eternity. A grain if sand is likely to move with the currents. A rock will not.
It’ll eventually be subducted, I think getting it into deep space is more likely to be long-term secure.