Curriculum·S212 TradFi Access Rails: ETFs, ETPs, and Treasuries·about 31 min
Choosing a wrapper
By the end of this lesson you can
- →Apply the five structural questions that separate one wrapper from another
- →Compute the ten-year cost of each access route on the same exposure
- →Check whether nominal diversification across sponsors is real at the custody layer
- →Choose a route from stated constraints rather than from a recommendation
Sophomore · enrolled learners
This lesson opens with One custodian behind most of the category.
- What happened
- This is a structural finding rather than an incident, and it is labeled as such. Reporting in April 2026 put Coinbase Custody at around 84 percent of US spot bitcoin ETF assets, roughly $77B, serving as custodian to the large majority of those funds. Fidelity uses its own Fidelity Digital Assets for FBTC, and BlackRock has added Anchorage Digital as an additional custodian for IBIT. NYSE parent ICE has since moved into crypto ETF custody in what has been framed as a challenge to that concentration. No custody incident has occurred at that provider, and nothing here predicts one.
- The decision point
- A holder who deliberately spread a position across three sponsors, on the reasoning that no single failure should reach all of it, can end up with three tickers and one set of keys. The diversification is a property of the structure rather than of the label, it is not visible on any fund comparison page, and it is stated in each prospectus and takes about two minutes per fund to check.
What you will be able to answer
- →What are the five structural questions?
- →How much does a 2 percent annual fee cost over ten years?
- →Why can diversifying across sponsors fail?
- →What decides the route?
Orientation and Year One are open: anyone can read them without an account. From Year Two onward the lessons are for enrolled learners, because progress through the later years only means anything if it is tracked against a record.
It is free. We do not sell the list and there is nothing to buy at the end of it.
Sources and review
- https://www.forbes.com/sites/digital-assets/2026/04/17/choke-point-bitcoins-77b-coinbase-etf-warning-shocks-markets/
- https://coinpaprika.com/news/nyse-parent-ice-crypto-etf-custody-coinbase/
- https://www.coindesk.com/markets/2024/01/11/grayscales-gbtc-discount-closes-to-zero-for-first-time-since-february-2021
- https://www.sec.gov/newsroom/press-releases/2021-229
Confidence medium·Volatility high·Reviewed 2026-08-06·Owner unassigned
Contested
The custody concentration figures are dated April 2026 and are moving, with at least one large exchange operator entering the segment. The structural argument is durable; the percentage is not, and the lesson instructs the reader to check rather than to rely on the number printed here.
Per P7 this lesson names no preferred route and recommends no product. The fee figures are illustrative rates chosen to span the observed range in the category, not quotes for any specific fund.
This lesson closes the Sophomore level. It deliberately does not resolve the self-custody versus wrapper question, because the answer depends on constraints the curriculum cannot observe.