Since miners receive 13.7 million fresh new DOGE every day and since I don't expect the current hype last too long, my answer would be somewhere between 2 and 10 million DOGECOIN.
I had my days dreaming like you did, but then I've learned about the infinite supply.
Maybe I'm wrong. Sometimes I wish to be wrong. However, don't rely on DOGE too heavily for buying as Cyber Truck...
DOGE has surprised everyone and it can still surprise. Price right now is going up again (now already at 0.0735$)! I just put in a sell order at 0.2 and 0.5$; with these crazy times everything seems possible
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I agree that DOGE is not the best to buy a Cyber Truck; for that I would more rely on BTC and/or ETH.