This paper shows how cryptocurrency markets can fuel cross-border capital flight by serving as marketplaces that match counterparts with and without (illicit) access to FX. In countries where international transactions are restricted, crypto exchanges effectively allow domestic agents to pay a premium to buy foreign currency. The counterparts to these transactions are agents with access to FX, who sell crypto holdings purchased abroad. A stylized model illustrates that restricted foreign currency amid economic imbalances incentivizes these transactions via persistent crypto premia in local relative to global markets. We analyze relative crypto pricing data in several country case studies, providing empirical support that crypto markets serve as marketplaces for capital flight that already took place, rather than a novel channel for capital flight. We make available a novel dataset on crypto market premia, which we propose as indicators of excess demand for foreign currency and capital control intensity. The dataset will be posted along with this paper and updated periodically.

To explore risks associated with digital money, this Fintech Note simulates the hypothetical large-scale adoption of crypto assets in a model of a small open economy. The model highlights that a foreign-currency denominated stablecoin can amplify currency substitution and capital outflows in response to negative shocks. Monetary policy transmission is also weakened, forcing the central bank to adjust interest rates more aggressively in response to shocks. Capital flow management measures—if they do not constrain crypto flows—further incentivize households to hold foreign stablecoins for circumvention purposes, exacerbating the negative effects of crypto adoption on the macroeconomy. This underscores that widespread crypto adoption can weaken policymakers’ available options for mitigating external shocks and potentially increase cross-country spillovers.

This paper employs high frequency transactions data on the world's oldest and most extensive centralized peer-to-peer Bitcoin market, which enables trade in the currencies of more than 135 countries. We develop an algorithm that allows, with high probability, the detection of "crypto vehicle transactions" in which crypto currency is used to move capital across borders or facilitate domestic transactions. In contrast to previous work which has used "on-chain" data, our approach enables one to investigate parts of the vastly larger pool of "off-chain" transactions. We find that, as a conservative lower bound, over 7 percent of the 45 million trades on the exchange we explore represent crypto vehicle transactions in which Bitcoin is used to make payment in fiat currency. Roughly 20 percent of these represent international capital flight/flows/remittances. Although our work cannot be used to put a price on cryptocurrencies, it provides the first systematic quantitative evidence that the transactional use of cryptocurrencies constitutes a fundamental component of their value, at least under the current regulatory regime.

The rapid growth of crypto assets raises important questions about their cross-border usage. To gain a better understanding of cross-border Bitcoin flows, we use raw data covering both on-chain (on the Bitcoin blockchain) and off-chain (outside the Bitcoin blockchain) transactions globally. We provide a detailed description of available methodologies and datasets, and discuss the crucial assumptions behind the quantification of cross-border flows. We then present novel stylized facts about Bitcoin cross-border flows and study their global and domestic drivers. Bitcoin cross-border flows respond differently than capital flows to traditional drivers of capital flows, and differences appear between on-chain and off-chain Bitcoin cross-border flows. Off-chain cross-border flows seem correlated with incentives to avoid capital flow restrictions.

Alternative assets such as fine art, wine, or diamonds have become popular investment vehicles in the aftermath of the global financial crisis. Correlation with classical financial markets is typically low, such that diversification benefits arise for portfolio allocation and risk management. Cryptocurrencies share many alternative asset features, but are hampered by high volatility, sluggish commercial acceptance, and regulatory uncertainties. This collection of papers addresses alternative assets and cryptocurrencies from economic, financial, statistical, and technical points of view. It gives an overview of their current state and explores their properties and prospects using innovative approaches and methodologies.