Concept
Digital assets have long ceased to be a hobbyist's toy—for a wealthy family, they are a full-fledged asset class that needs to be stored somewhere, taxed, and passed on to heirs. In the theory of five flags, this is the "digital flag": the question is not whether to buy crypto, but how to hold it so that the structure survives both market volatility and tax scrutiny.
From Anonymity to Transparency
The first generation sold crypto as a new offshore: anonymous, outside banks, outside borders. That era is over. The OECD has launched CARF—a separate standard for automatic exchange on crypto-assets, mirroring the logic of CRS—and the EU has enshrined the rules of the game in the MiCA regulation. The "naive digital flag"—a wallet no one knows about—no longer works today: the exchange knows, the custodian knows, and soon your tax authority will know through your residency.
💡 Today, crypto is a question of governance: what to hold assets with, through whom to report, and to whom they will pass. Transparency has become the condition under which an asset can be held above board at all.
Custody: Self-Custody vs Qualified Custody
The main choice is who holds the private keys. Self-custody (hardware wallet, multisig) means full control and no intermediary, but you take on all the operational burden and risk yourself: losing the seed phrase equals losing the asset, and a hack is irreversible. Qualified custody—a regulated custodian with insurance, audit, and asset segregation—removes operational risk but adds counterparty risk: you depend on the stability and jurisdiction of the custodian.
Keys and Inheritance
The most underestimated problem is succession. A private key known only to the owner turns the asset into something forever inaccessible after their death. Therefore, seed phrases and access are brought into the inheritance circuit: multisig with key distribution among trusted persons, instructions with a notary or trustee, a qualified custodian with a documented inheritance procedure.
⚙️ A working scheme for a family: part of the holding with a qualified custodian for reporting and inheritance, part in self-custody via multisig (e.g., 2 of 3), where keys are distributed between the owner, a trusted person, and a trustee.
Taxes
In most jurisdictions, crypto is taxed as property, not as currency: a taxable event arises upon sale, exchange of one asset for another, payment for goods, and often upon staking and airdrops. Who exactly has the right to tax all this is determined by your tax residency—which is why the digital flag makes no sense to plan in isolation from the tax flag. Specific rates and rules vary widely by country and need to be checked for your situation.
Ownership Structures
Most private investors hold crypto personally—and for moderate amounts, this is reasonable. A structure (company, foundation, trust) is justified where issues of inheritance, asset protection, or joint ownership arise, not where one wants to "hide." At the same time, the structure must have real substance, otherwise the tax authority will see through it, and the custodian and bank simply won't open an account.
Regulation: CARF and MiCA
CARF (Crypto-Asset Reporting Framework) is CRS for crypto: exchanges and custodians will transmit client data to their countries of tax residency. The first wave of automatic exchange is in 2027 for 2026 data; it includes Switzerland, the EU, Cayman, the UK, and about fifty other jurisdictions, while the UAE, Singapore, Hong Kong, and the US join from 2028. In the EU, CARF is implemented through the DAC8 directive. In parallel, MiCA is in effect: from December 30, 2024, only licensed CASPs may provide crypto-asset services in the EU, and platforms that operated previously have a transitional period until July 1, 2026.
💡 The digital flag is built on three decisions: where to store (self vs qualified custody), how to tax (through residency), and to whom to pass (inheritance circuit of keys). Secrecy has left the equation—discipline remains.
This material is for informational purposes and is an expert overview, not individual legal or tax advice.