That is a fact and the market dynamics will change!
The intro of currency pairs is in the works!
I think you need to know other facts such as;
-, Most exchanges don't support FIAT or Country Currency as trading pairs on their platform because of a ban from the government or Banks
-, There are many stable Coins or Tokens like USDT which replaced the role of FIAT Currency in trading pairs but, it cannot destroy Bitcoin and Bitcoin is still a favorite trading pair for Altcoins
Do you still think that Bitcoin will be destroyed because of it?