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It’s too soon to tell how many investors will get in on BITO — but the fund did see lots of trading action in its first week. In general, the more accessible cryptocurrency assets are within traditional investment products, the more Americans could buy in and influence the crypto market. Instead of learning to navigate a cryptocurrency exchange to trade your digital assets, you can add crypto to your portfolio directly from the same brokerage with which you already have a retirement or other traditional investment account.

Savvy cryptocurrency users are therefore maniacally protective of their private keys, typically storing them in multiple digital locations — although generally not Internet-connected, for security purposes — and on paper or in other physical form.
Since the first digital currencies were devised after the financial crisis, $2.3tn has been invested in them. But how do they, and other assets transacted on blockchain technology, actually work? And what risks do they pose? Read our explainers