"Although the U.S. and the European Union have designated Hamas as a terrorist organization, 'they’re not effectively cut off from the international financial system,' said Hans-Jakob Schindler, senior director of the Counter Extremism Project. 'They actually are able to invest funds in companies and in real estate.'
...
Cryptocurrencies have helped the group invest its money while bypassing international financial sanctions according to a report by the Counter Extremism Project."

"'These bans are one of the most important instruments a democracy has to prevent money flowing to terrorist organizations,' Hans-Jakob Schindler from the transatlantic think tank Counter Extremism Project (CEP) told DW. However, he added: 'It is always difficult, because in Germany associations and non-profit organizations enjoy a certain degree of protection, and investigations by authorities such as the Office for the Protection of the Constitution are limited when it comes to finances.'

The line is crossed when violence is openly called for or endorsed. 'As long as individuals restrain themselves in this regard, it will be very difficult,' Schindler explained, adding that suspects usually pay close attention to what they say, so as not to attract attention from the authorities."

CEP Senior Director Dr. Hans-Jakob Schindler interviewed about the financing of Hamas by supporters in Germany and action by the German government. 

[Translated from German] "'These bans are one of the most important instruments a democracy has to prevent money from flowing to terrorist organizations' Hans-Jakob Schindler from the transatlantic think tank Counter Extremism Project (CEP) told DW. But: 'It is always difficult because in Germany clubs and non-profit organizations enjoy a certain level of protection when it comes to their activities, and investigations by important authorities such as the Office for the Protection of the Constitution when it comes to finances are limited.'"

[Translated from German] “Experts are irritated by this approach. 'It is hardly possible that a family built up a criminal organization alone over the years and operated,' says Alexander Ritzmann, who is at the think tank Counter-Extremism Project right-wing extremist criminal structures deals. 'I think it has to give a network: Because money laundering plays a role in drug  trafficking always a role. One must restaurants, fitness centers or run other businesses to do that to launder drug money. One can don't just take that to the bank.'“

"Analysts with the Counter Extremism Project were used to seeing radical groups asking for donations in crypto currencies. Everyone from neo-Nazis to ISIS sympathizers liked Bitcoin, as it helps avoid oversight from banks and regulators. But in 2020 those with the unenviable job of monitoring hate groups online saw a pro-ISIS group switch its donation preference from Bitcoin to a much smaller and lesser know currency called Monero...'About a year and a half ago this Monero thing took off, and now it’s pretty widespread,' Hans-Jakob Schindler, the senior director of the Counter Extremism Project, says."

"Some analysts have suggested that jihadist financing flourished because South African authorities grew complacent at the lack of visible Islamist activity.

'I don't think South Africa realised it. It was the Americans who said, 'something not okay is going on in your country,"' Hans-Jakob Schindler, director of the Counter-Extremism Project think-tank, told AFP.

'The entire government is now put to task,' he said."

CEP Senior Director Dr. Hans-Jakob Schindler writes: "While regulators and policymakers dither and try to decide if cryptocurrencies have a future in the economy, early adopters, including terrorists and violent extremists, are exploiting a law enforcement blind spot. The ease by which money laundering and terrorism financing take place with cryptocurrencies and the more dangerous privacy coins are becoming a security threat of our own making through bureaucratic inaction."