Bitcoin and other cryptos are being used for more than a decade. There's anonymity with this technology and it is not surprising to know that Bitcoin and ither cryptos are being used in illegal transactions, simply because there's this freedom. Once you own it, you are free to where you will use it; means of investment, purchase of goods if it is aloowed in your area, sending an amount to your loved ones and even using it to send money to be used in war, perhaps. This is known for years already but it is not the reason why cryptos are banned to some countries.