It sounds like you must Enjoy paying $100+ to move your coins off an exchange.
Tell your grandma to buy Bitcoin, it's a great investment. I'm sure she will love the part where she has to calculate a priority fee to pay based on the size of her transaction.
For everything else, there's Bitcoin Cash.
"Grandma" just gave her verdict I think. She'd rather pay a $100 transaction fee than take a million dollar capital loss because her store of value got f*d with at the protocol level.