My post had nothing to do with
"the holy grail," but I'll bite:
First, you haven't defined exactly what you mean by
"the holy grail."
Second, ask and answer for yourself,
"what would ultimately happen at a poker game where just one player won every hand?"
Third, ask and answer for yourself what would ultimately happen to the markets if someone had the ability to trade any instrument with 100% accuracy. (I use this as a possible definition of
"the holy grail" since you've failed to provide one for your own question.)
Fourth, ask and answer for yourself,
"what evidence is there that Superman doesn't really exist and isn't really from a real planet named Krypton?"
https://www.seeker.com/astrophysicist-discovers-supermans-krypton-1766311765.html