What Happened
On July 4, 2025, the One Big Beautiful Bill Act (OBBBA) was signed into law, permanently raising the federal estate and gift tax exemption to $15 million per individual ($30 million for married couples) — starting January 1, 2026. 3 This prevented the TCJA sunset that would have cut the exemption roughly in half, to approximately $7 million per person. The 40% federal estate tax rate still applies to amounts above the exemption.
The crisis was averted. But the underlying problem was exposed. For early Bitcoin adopters — some of whom hold positions now worth millions from initial investments of hundreds or thousands of dollars — the near-miss made the point. And it arrives against a backdrop where virtually no one in the crypto space has done adequate succession planning. Research shows that 90% of crypto holders express concern about what happens to their digital assets after death, but crypto holders are four times less likely than traditional investors to have executed a will or trust.
The numbers behind this gap are sobering. Bank of America 2 projects that approximately $6 trillion in cryptocurrency will need to change hands through inheritance by 2045. Meanwhile, blockchain analysts estimate that between 2.3 and 4 million BTC 1 — representing 11% to 18% of total supply — are already permanently inaccessible, with a significant portion attributed to holders who died or became incapacitated without transferring access to their keys.
Why It Matters
When you die with money in a bank account, your executor presents a death certificate and the bank releases the funds. When you die with Bitcoin in self-custody, there is no bank to call. If no one knows your seed phrase, your Bitcoin is gone. Not frozen. Not in probate. Gone — permanently removed from circulation, benefiting every other holder through deflation but providing nothing to your family.
This is the fundamental tension of self-custody inheritance: the same security measures that protect your Bitcoin from theft during your lifetime can prevent your heirs from accessing it after your death. A well-protected seed phrase that no one else can find is simultaneously perfect security and perfect loss.
Bitcoin inherited at death receives a stepped-up cost basis. If you bought 10 BTC at $500 each in 2015 and they're worth $90,000 each when you die, your heir inherits them with a cost basis of $90,000 — not $500. The $89,500 per-coin appreciation during your lifetime is never taxed. This is one of the most powerful tax advantages in the entire Internal Revenue Code, and it applies fully to cryptocurrency.
Contrast this with gifting Bitcoin during your lifetime: the recipient inherits your original cost basis and owes capital gains on the entire appreciation when they eventually sell. For long-term holders sitting on enormous unrealized gains, the inheritance route is dramatically more tax-efficient — which makes succession planning not just a security question but a financial optimization question.
What This Means for You
Start with a digital estate plan. This doesn't have to be complex. At minimum: designate a trusted person (a 'digital executor') who knows that your Bitcoin exists, document the general location of your seed backup (not the phrase itself — the location), and create a set of instructions that your executor can follow to access your holdings. Store these instructions separately from the seed phrase, ideally with an attorney or in a sealed document within your estate plan.
For experienced holders, consider a multi-signature inheritance structure. A 2-of-3 multisig where one key goes to a trusted family member, one to an attorney, and one remains with you creates a system where no single party can steal the funds but any two can recover them. Time-locked transactions — which become spendable after a set period unless you refresh them — offer another layer of automation for inheritance.
And consult an estate attorney now, not later. The OBBBA saved the higher exemption, but future legislation could reduce it. More importantly, the $15 million threshold means many long-term Bitcoin holders with seven-figure positions still face potential estate tax exposure if their holdings continue to appreciate. Estate planning is a 'this quarter' priority, not a 'someday' project.
What to Watch
The permanence of the OBBBA exemption. The $15 million exemption is now indexed for inflation, but a future administration could reduce it through new legislation. Also watch for crypto-specific inheritance products — companies like Casa and Unchained are developing guided multisig inheritance protocols that simplify the technical burden while preserving self-custody principles.