ETF are not for grandma, they're primarly for institutions. They'll move an amount of money without precedents in bitcoin. They'll be able to create the incentive to hijack miners to mine a shitcoin fork
Discussion
The best version of bitcoin will win my money is on Satoshis version not any fork by any institution. They might have some short term success but in the end the best money will win, I don’t believe they are capable of improving bitcoin is it will fail.