see https://www.justice.gov/opa/pr/global-disruption-three-terror-finance-cyber-enabled-campaigns
Without going into the details, some of which remain unclear to me after reading the release (i.e. How the U.S. authorities seized the crypto content of over 300 cryptocurrency accounts -> residing on Exchanges I presume), the above does harm the reputation, and what’s worse, sets a spotlight on cryptocurrencies for authorities to look at in the wrong shade of desired light.
It's so sad to hear news like these. It gives Bitcoin and other cryptocurrencies a negative perception among people in the mainstream world. That's what you get with something that's a "double-edged sword". Bitcoin can be used for both good and bad things just like it's the case with the Internet nowadays. If a lot of bad things are made with Bitcoin, people will be quite skeptical in using it within their daily lives. It's up to us to spread the word about Bitcoin's legitimate use cases as much as possible. We already have governments trying to regulate the crypto industry. Since everything revolves around centralized infrastructure (centralized exchanges and wallet providers), it's possible to catch malicious actors easily. With heavy-handed regulation, I think the number of scams in the crypto space will be reduced to a point where they'll do little to no harm over Bitcoin's reputation in the mainstream world.
Nonetheless, people often associate scams with Bitcoin due to lack of knowledge. Once they know how everything works, they'll be able to distance scams from Bitcoin itself. Let's hope that in the future, Bitcoin's reputation will be much more positive than what it is right now. Just my opinion