I'll let Mr. Thomas chime in, but as I mentioned, I don't believe that the young people today are likely buying structured products like Bitcoin or Ethereum ETFs.
Those assets are being held in custody—or cold storage—largely with Gemini or Coinbase. These are two highly regulated, highly respected U.S. entities. Gemini, for example, holds a BitLicense in New York. It's a trust company. It's the gold standard of custody.
I don't think that most people—I don't want to say under-40s—who want to engage in a self-hosted wallet are the people who are buying the assets through that avenue. I would assume that those individuals are perhaps holding their assets on a crypto trading platform. It's up to that individual crypto trading platform as to how they are doing the custody.
It could be very well that they're using Gemini or Coinbase on the back end. They are perhaps using a software-based wallet called Fireblocks for some of the custody. The individuals may be withdrawing that asset to a wallet that they are in control of. It can be software-based or hardware-based—the hardware being a little USB key that they plug into their computer.
I also would point out that it's not risk-free. A lot of people say that it is a solution; it just comes with a different set of responsibilities. That end user would have to secure that wallet and have an appropriate backup to ensure they don't lose their funds.