I wouldn't say $2500 is easily attainable. That would raise the btc market cap from roughly $6 billion to roughly $30 billion.
If you think $24 billion is easy to come by, well then pm me, I have some bridges for sale.
While I'm also sceptical about breaching the 2k mark on this runup, your math does not take hodlers into consideration.
If 50% of the coins would not be sold during the rise, the capital needed is actually "only" $13 billion
I'm not sure if my is correct here as I'm too lazy put some effort in it right now, but heres another example to make my point more clear:
If all of the sudden there wouldnt be any possibility to trade btc any more but local bitcoins and one crazy guy would pay $2.5k for the last available bitcoin, the market cap would rise to 30bn just based on this 2.5k injection.