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cryptocurrencies like Monero make value exchange completely anonymous. While this is a very good thing in itself because it gives us complete control of our privacy, it also plays the same on the other side.

Credit cards and high fund movements was one way to track fishy transactions in the past(although at some point, the banks overstep their imposition).

With cryptos, these transactions become seemingly seamless; Activities on the dark web has increased tremendously. If a terrorist group shaking the world were receiving funding smoothly and anonymously, I don't think there'll be a way to track and mitigate their actions nor will there be a way to ascertain their sponsors (or at least, this would be harder to do)

Again, this boils down to how objective you are in your thinking. I guess you should re-access your stand on my claim being "overestimated"