Most coins would not be possible as there are limited in supply and investors who are buying them will bid up the price.

What you are referring to are stable coins like tether whose purpose is to provide a coin which is peg to USD or any fiat that the stable coins is designed for.

Stable coins is important and there needs to be more such stable coins so that usage of crypto as a currency can be better promoted.

No one wants to use BTC as the value is volatile.. but with a stable coin, there is no difference from fiat so people will use it more readily