I am not making it look easy but I think 7x is what it needs to reach and claim that back.
Doge's marketcap is $15B right now with 171B coins circulating. So it needs roughly 8.4x to get back to the old ATH and about 11.4x to hit $1. At this size that's not a small move, especially when the market is nothing like the 2021 cycle.
Liquidity is also getting fragmented with so many altcoins already out there. Not to mention institutions and big players have moved on to coins with real use cases. They barely care about memes. So getting back to the old ATH is already a challenge for DOGE, let alone $1 or higher, imo.
I agree with aioc, it'll take way more than Elon to get doge to $1.