Tourist reviews will save your finances

Ukraine has a predominantly cash economy. The network of bank offices and vending machines has grown rapidly and is now easily accessible in all but the smallest villages. In order to withdraw money in the village where you are for the first time, it would be nice to read tips and reviews. Indeed, check the security of the ATM - it is wise to use the ATM that is located in the bank itself and not in another institution. You can use your credit cards (mainly MasterCard & Visa) or traveler’s checks. Credit and debit cards are accepted by supermarkets. But do not use your credit/debit card to make payments at institutions in small towns and towns, as retailers are not trained and do not have sufficient knowledge to guarantee the security of the card. Instead, cash payment is widespread. Locals (particularly business people) sometimes pay a hefty sum in cash, which is considered unusual in other countries where a person who pays a large sum in cash is automatically suspected of having links to criminal activity.
In addition, it is strongly recommended to avoid currency exchanges on the street, as there are thieves using such currency exchange places: they can instead of the current national currency give you old Soviet-era money or coupons that have been withdrawn from circulation since the mid-1990s.
As mentioned above, to avoid trouble, check out the information available online and read more touristic on the subject. From them you can get a lot of useful information about the features of rest in Ukraine.