>>2835829
That only shows you restaurants whose menus are online. There is no end of places to eat for every budget in Istanbul, and many places are not prominent online. You can eat a decent-sized chicken shawarma for 100 lira ($2.25 USD at the time) at a table set in a roadway if you're poor. Surprisingly, it digested well as a late-night dinner, and I drank the yucky-tasting tap water from my hotel. Don't be a Jew and make a scene over a high price if you are ordering something expensive. Istanbul is full of expensive treats (i.e. European tier pricing, not Asian tier pricing).
>>2835776
If I hand over a 5 dollar bill, I could get two 100 lira notes in ten seconds anywhere in Istanbul (at the time of my visit). The exchange rate was 40.4 back then. Today it is 41.9.

Flying Air Arabia I paid a dollar bill for a 500 mL water bottle after they refused to let me board with water.

In Colombia somebody in the airport gave me a mask after I landed not knowing medical masks were mandatory in public. I was wearing a bandana on the plane. I paid him a dollar because I did not have any local currency.

Tourist visa fees in many countries are payable with USD cash only. Are you going to be one of those fools in Aranyaprathet posting on reddit "where can I exchange Thai baht for USD for my Cambodia visa?" Yes, you will be. Meanwhile I will hand over a crisp $50 with my visa application and waltz into Nepal for 30 days.