1k is impossible, 2 years ago, all time high price was 250-300 sat. At that time, the coin supply was less than 40 billion. Now the supply is 106 billion.
overall supply is irrelevant. all that matters is the amount of coins for sale on an exchange at the time. i'll bet an awful lot of doge have been deleted or lost.
And demand is obviously key here too. I think there is just way too much competition here in the zoo for doge to thrive. But who knows, it's made it way farther than most people thought it would.