Actually every coins cannot get huge price but still people choose these tokens for investment in hope that current price is lower so it can give them higher return but remember that every coin cannot go immediately higher but will takes years like that of Shiba inu.
With a massive 589T total supply, i don't think shiba inu is going to achieve such a milestone of 1$ even in the long run. This is totally unrealistic, even for bitcoin to have that marketcap so if anyone is expecting or predicting that shiba inu will touch $1, he has no idea about tokenomics. It can only be possible if team burns so much token from the supply to lower the circulating supply of the token. This will require massive funds to do, and this is unreasonable to think about as well for a meme coin.