I believe that the Turkish government makes a decision on cryptocurrencies precisely for the reason that Turkey is in a leading position along with the United States and India in the spread of coronavirus around the world. Their economy is in a very poor condition, while it should be borne in mind that the holiday season in Turkey will practically be closed, which means that the receipt of funds in the State Treasury will be almost critical. Since the government sees a large-scale leak of finance into the cryptocurrency, they accordingly took tough measures to reduce the damage.
This is just ridiculous. How can a ban on cryptocurrency help them with reduced tourist arrivals or a decrease in tax revenue? There is a very small correlation between cryptocurrency and these sectors. And the ban covers purchase of goods and services using cryptocurrency. And this is even stranger. You need to pay your taxes, irrespective of whether you are making the payment using the Turkish Lira, US Dollar or Bitcoin. So how this is going to help? If you claim that this measure was an attempt to prop up the Turkish Lira, then it would have been more understandable.