On this subject, I could send the committee an extremely interesting report.
In that report, the FBI said that if it had been able to create a way to track down criminals, it would have used cryptocurrency. Indeed, it's ideal, because you can see every possible transaction.
The risks are not necessarily related to blockchains, but rather to third-party applications. For example, we can talk about an application or exchange that is not regulated and does not use the same technology as blockchains.
I can have cryptocurrency, but, since it's not secure, I can definitely get hacked. That's where the danger comes from, not the blockchain.
As my colleague mentioned, security and public education become extremely important. The reason we are here is to make it safe and simple. Every time there has been a theft or a hack, the FBI or the investigators have recovered the funds. It's impossible to get the money out anonymously. So it's extremely inefficient for criminals.