If we are talking about security, here the police patrol the streets day and night, street cameras are installed, often neighbors can call the police after hearing a loud conversation of residents. You can move to Turkey with peace of mind.
If we are talking about the comfort of a foreign citizen, then, as in any country in the world, Turkey has more modern, rich and beautiful areas, as well as poorer, older areas. There are areas where mainly the local population lives, and those where predominantly Russian-speaking residents. One area can be the best for you and seem bad for another person — this is a very individual issue. That is why our managers first find out the needs and preferences of each client, and then select the best option.