What Is a Bitcoin Dynasty Trust, and Who Actually Needs One?
A bitcoin dynasty trust is an irrevocable trust, typically established under South Dakota law, that holds bitcoin outside the grantor's taxable estate with no expiry date, no forced distributions and no public filings. South Dakota abolished the rule against perpetuities in 1983, so a trust formed there can last indefinitely, where the common-law rule it replaced capped trusts at roughly a century. For a bitcoin holder, the appeal is obvious: an asset designed to last a thousand years placed inside a legal structure that has no end date. The harder question, and the one Onramp's report The Legacy Layer: Bitcoin IRAs & Estate Planning is built around, is what custody sits inside that structure for the next hundred years.
The container question
Every financial instrument encodes an assumption about time. The bitcoin network has run for seventeen years. The IRA as a statute dates to ERISA in 1974, so 52 years. The oldest bitcoin custodians, Coinbase from 2012 and BitGo from 2013, have existed for about fourteen. Consumer hardware support windows run about five years under vendor end-of-life policies. A South Dakota dynasty trust has no end date at all.
Set those against a 30-year horizon, one retirement and one generation, and nothing that holds bitcoin has yet cleared the line. The legal wrappers clear it comfortably. A structure with no end date resting on a single institution that has existed for fourteen years is a structure with a mismatch at its foundation.
What a dynasty trust does
The progression the report describes starts with beneficiary designation and a transfer-on-death agreement, which is adequate for many estates on its own. Trust titling is the next rung, with a custodied vault titled directly to a revocable trust, which handles probate avoidance and privacy while leaving the grantor in full control. Above that sits the dynasty structure.
Onramp's Dynasty Trust Services launched in August 2025 with First Covenant Trust & Advisors as regulated trustee under South Dakota trust law, covering dynasty trusts, intentionally defective grantor trusts, domestic asset protection trusts and spousal lifetime access trusts. Onramp does not act as trustee.
Four things follow from the structure. Perpetual asset protection places trust assets beyond the reach of creditors, lawsuits and divorcing spouses. Bitcoin held outside the taxable estate sits beyond the 40% federal rate above the exemption, which is tax-efficient structuring of the kind estate practice has done for a century, applied to a new asset. Multi-generational continuity follows, with no forced distributions and no public filings. And directed governance divides the roles, with the client remaining Trust Advisor on investment decisions while the licensed trustee administers.
Liquidity is addressed too. A properly drafted trust can borrow against trust-held bitcoin without triggering a capital gain, which is what makes legacy without liquidation a real working arrangement rather than a slogan.
The paradox, and how it resolves
Many of the largest bitcoin holders accumulated by refusing to trust any single entity. Traditional trust structures have historically required them to hand assets to exactly one trustee and one custodian. So every step toward better estate planning meant a step backward on custody, and a great deal of bitcoin that should be in a trust is not, for that reason alone.
Embedding a Multi-Institution Custody quorum inside the irrevocable structure dissolves the trade-off. The trust holds a vault secured by a 2-of-3 quorum of three independent institutions. If one institutional keyholder fails or is compromised over the decades the trust is designed to run, it can be replaced without the structure collapsing around it. That replaceability is what a perpetual structure needs and a single custodian cannot provide.
Who it is for
The report is direct about the threshold. Below the point where an estate is likely to cross the federal exemption, $15 million per person and $30 million per married couple from 2026, or where the holder expects only modest appreciation, the complexity and cost of a dynasty structure are not obviously worth it. Beneficiary designation, transfer-on-death titling and a revocable trust cover most estates well, and all three sit on the same custody, so nothing needs to migrate if the position later grows into the range where a dynasty trust makes sense.
For those above the threshold, a structure this durable raises questions every family eventually faces anyway: what the wealth is for, and whether the inheritor is ready to receive it. Onramp's standalone report, Onramp Bitcoin Dynasty Trusts Administered by First Covenant Trust & Advisors, carries that discussion.
The full progression from IRA to dynasty trust, and the argument for why custody should be the one variable that never changes along the way, is in The Legacy Layer: Bitcoin IRAs & Estate Planning.
Frequently asked questions
What is a bitcoin dynasty trust?
A bitcoin dynasty trust is an irrevocable trust, typically under South Dakota law, that holds bitcoin outside the grantor's taxable estate indefinitely, with no end date, no forced distributions and no public filings. South Dakota abolished the rule against perpetuities in 1983.
How much bitcoin do you need for a dynasty trust to make sense?
Onramp's research keys the threshold to the federal estate exemption: where an estate is unlikely to cross $15 million per person, or $30 million per married couple, or where only modest appreciation is expected, the added complexity and cost are not obviously worthwhile. Simpler structures such as transfer-on-death titling or a revocable trust cover most estates.
Can a bitcoin dynasty trust borrow against the bitcoin?
A properly drafted trust can borrow against trust-held bitcoin without triggering a capital gain, which allows liquidity for beneficiaries without selling the position.
Who holds the keys to bitcoin in a dynasty trust?
In Onramp's structure the trust holds a Multi-Institution Custody vault secured by a 2-of-3 quorum of three independent institutions, with First Covenant Trust & Advisors as regulated trustee. A failed or compromised keyholder can be replaced without the trust collapsing.
Related reading
- Bitcoin Inheritance: A Spare Key Is Not a Deed
- Bitcoin Estate Tax Rules in 2026, in Five Numbers
- What Happens to a Bitcoin IRA When You Die
- Full report: The Legacy Layer: Bitcoin IRAs & Estate Planning
This article is research and analysis, not a recommendation to adopt any legal or tax structure. Onramp is not a law firm, an accounting firm or a tax practice, and nothing here is legal, tax, accounting or investment advice. Trustee services described in connection with dynasty trust structures are provided by First Covenant Trust & Advisors as regulated trustee under South Dakota trust law; Onramp does not act as trustee. Tax rules are federal, current as of August 2026, and subject to change. Consult your own attorney, accountant and financial advisor before acting. Bitcoin is a volatile asset and its price can fall as well as rise.
