Ada at 10$ would mean a total market cap of 310.000.000.000$
That is twice the market cap of Ether today.
I doubt very much it could happen, but who knows...
That's why so many people are saying that's a non sense prediction.
I doubt ada can even reach $1 again soon. $10 is a very very big price for ADA and when it was rouching $1 and i will call this one as an over valued coin without a proper utility usage.
I should remind you now if even the new projects are not interesting issuing their token on ADA