Global central bank researchers warn that a shadow financial system within the crypto market is forming, as liquidity becomes increasingly concentrated in just a few massive trading venues. According to data from CryptoQuant, Binance has cleared over $1 trillion in trading volume during the first 112 days of 2026 alone, vastly outstripping competitors like MEXC ($284.9 billion), Bybit ($242.3 billion), Crypto.com ($219.9 billion), Coinbase ($209.3 billion), and OKX ($195.2 billion). This concentration is spotlighted in a Financial Stability Institute paper by the Bank for International Settlements (BIS), which notes that large crypto platforms now offer services akin to traditional financial intermediaries, including yield products, lending, derivatives, staking, and token-related offerings.
The BIS paper describes these platforms as ‘multifunction cryptoasset intermediaries’ (MCIs) due to their amalgamation of roles typically distributed among banks, brokers, exchanges, and custodians. This evolution raises concerns that the venues drawing significant liquidity are also becoming storage hubs for assets, collateral, leverage, and yield-seeking activities. As such, regulators are questioning whether these platforms have become financial intermediaries without appropriate rules concerning customer assets, leverage, and liquidity risk.
Despite numerous exchange failures and market downturns over recent years, trading remains dominated by a small cadre of large platforms. BIS data indicates that around 200 to 250 centralized spot exchanges were active in 2025, yet Binance alone accounted for about 39% of global volume on such exchanges, with the top ten handling roughly 90% of total activity. The largest MCIs operate across over 100 jurisdictions and serve an estimated 200 million to 230 million unique users.
These platforms are evolving from mere trading venues into balance-sheet centers lacking many legal protections found in traditional finance. This structure grants them influence over pricing, leverage through derivatives products, and custody of customer assets used across spot, margin, staking, and yield products. Binance’s $1.09 trillion volume underscores the network effect, attracting traders to where liquidity is deepest.
The integration model adopted by major crypto exchanges—offering services from trading to lending under one roof—draws regulatory scrutiny. In traditional finance, these functions are typically separated into institutions with distinct regulatory requirements. Crypto platforms often lack such prudential oversight, raising risks like credit and liquidity issues without equivalent capital buffers or deposit protections.
The BIS paper highlights the risk associated with earn-and-yield products marketed for passive returns on idle crypto assets. These arrangements can leave customers as unsecured creditors to the platform in times of crisis, unlike bank depositors who benefit from regulatory safeguards. Notable failures like Celsius Network and FTX have exposed these vulnerabilities.
Moreover, the BIS warns about the rapid transmission of stress through concentrated leverage in crypto derivatives markets, which run on automated liquidation engines. The October 2025 flash crash demonstrated how quickly such systems can unravel, with $19 billion in forced liquidations impacting over 1.6 million traders due to weakened collateral triggering margin calls.
As traditional finance increasingly intersects with the crypto world through various channels, regulators face a challenge: large crypto platforms operate beyond conventional exchange roles. The BIS paper advocates for prudential measures such as capital and liquidity buffers, enhanced governance standards, stress testing, and clearer customer asset segregation to address these concerns. Regulators may need both entity-based and activity-specific rules to manage the risks posed by interconnected MCIs within broader financial systems.