We heard that crypto is often used for terrorist funding, but according to IOCTA in 2018, such an assumption is wrong.
Today, the popularity of Bitcoin is getting better, but the relationship with terrorist funding, they prefer the classic method of transferring through banks.
so, terrorist groups that use bitcoin are only low level transactions.
Terrorist will not use cryptocurrency in their illegal activities because it is traceable. Blockchain technology maybe anonymous but it can be trace whenever they use it. Even illegal offender still use fiat currency than cryptocurrency.