Organized crime groups in Ireland have adopted an analog workaround to a digital problem. Rather than attempting to disguise cryptocurrency holdings through mixers or privacy coins, gangs are storing hardware wallets, seed phrases, and private keys in rented private vaults — alongside cash, luxury watches, and forged passports.

Ireland's Criminal Assets Bureau (CAB), the agency tasked with seizing criminal proceeds, says this storage method is becoming a standard tactic for groups seeking to keep digital wealth beyond the reach of law enforcement. Established in 1996 in the wake of the murder of journalist Veronica Guerin, CAB was built around a civil forfeiture model that targets assets rather than securing criminal convictions — a model now being tested by assets whose keys exist only as hidden physical objects.

Old-School Vaults, New-School Assets

The approach is deceptively straightforward. Crypto assets live on blockchains, visible to anyone who knows where to look, but without the corresponding private keys or recovery phrases, those assets remain untouchable. By hiding the physical materials needed to access wallets inside rented security boxes, criminals create a gap between what investigators can observe on-chain and what they can actually seize.

CAB Chief Bureau Officer Michael Gubbins noted that criminals believe using private vaults provides a layer of anonymity — and that belief is not entirely misplaced. Renting a vault is legal, and investigators must establish a link between the vault's contents and criminal proceeds before they can obtain a forfeiture order, a higher bar than simply freezing a bank account.

Gubbins also acknowledged that the volatility of cryptocurrencies contributes to their appeal for laundering operations.

A €30 Million Breakthrough

In March 2026, CAB successfully accessed a previously locked wallet containing 500 BTC, valued at approximately €30 million at the time. The wallet was part of a much larger seizure of 6,000 BTC dating back to 2019.

Europol supported the operation, underscoring the cross-border character of both organized crime and crypto asset recovery. Across Europe, law enforcement agencies have faced a similar pattern: blockchain analytics firms such as Chainalysis routinely estimate that only a small share of illicit crypto is actually seized, with lost or inaccessible keys a recurring obstacle.

Over the past decade, CAB has sold seized crypto assets worth roughly €6.5 million. Set against the €30 million contained in a single recovered wallet, that figure suggests the bureau's accessible holdings have historically represented only a fraction of the assets recorded on its books.

Legislation on the Horizon

CAB is now examining new legislative tools intended to strengthen its ability to seize and freeze crypto assets. The existing legal framework was designed for a world in which criminal wealth was held in bank accounts, real estate, and physical goods. Digital assets — particularly those secured by off-chain credentials hidden in anonymous vault boxes — do not fit neatly into that model. The review also comes amid a broader EU push, including the Asset Recovery and Confiscation Directive adopted in 2024, to make it easier for member states to identify, freeze, and confiscate criminal assets, including digital ones.

Private vault rentals remain entirely legal. The challenge facing investigators is proving that the contents, whether a hardware wallet or a slip of paper bearing 24 words, constitute the proceeds of crime. What to watch next is whether new legislation addresses that evidentiary gap directly, or whether recovering crypto remains dependent on physically locating the keys.