With bikes, you can avoid traffic and get around the city a lot faster compared to cars and motorcycles, that is why more people are using bikes. The problem with bikes is that it gets stolen quite easily, a number of bike owners come back to nothing when they just got out of the convenience store and see that their bike is already gone. There is a wide range of bike locks to choose from in the market but choose wisely because some bike locks are quite easy to pick. In a bike theft area like yours, your best bet to coming home with your bike will have to be buying the best and most durable bike lock around. A thin cable lock is probably fine for a town with minimal crime.
These thin cable locks will not work against bolt cutters though, the common tool used by thieves in crime filled areas. You have to know that with a casual type of theft, thin cable locks will prevent people from borrowing your bike without asking. You will have to work harder than that if you want to keep your bike in a theft prone area, make sure to use the steel U-lock which is recommended almost every time, put it around your bike and the front tire and lock it around a pole or something that is strong and stationary. By bringing an extra U-lock, this will help you from extreme theft areas which will lock down the rear wheel, making it even harder for the thief to ride away with your bike. You can but some additional cable for more protection or just bring the bike with you to avoid theft.
Your bike seat can be stolen as well, that is why you should think about locking that down with cable. Or you can have it changed with a piece that will need an allen wrench to be removed in order to avoid having your seat stolen together with your chained down bike. People should know that good bike locks do not come cheap. But it is a much better investment than to buy another bike, a lock and a bike will have a huge price difference. Ask around the place to know about the current situation with bike thefts. You will have to go straight to the local bike shop and ask there, there will be some information about owners coming back to buy a new bike because the last one got stolen.
The sooner you get to know the current situation there, the sooner you can start protecting your bike, you can buy the needed items to prevent theft and avoid spending money on a new bike.