Bitcoin Sous Contrôle? La Vérité sur l'affaire Jane Street

In late February 2026, a peculiar shift occurred in the Bitcoin market. As rumors of an "invisible hand" manipulating prices intensified, a lawsuit against the financial giant Jane Street regarding events from 2022 coincided with the sudden disappearance of the "10 am Dumps"—a recurring sell-off pattern in New York. This coincidence reignited a profound fear among investors: is Wall Street diluting Bitcoin’s mathematical scarcity with "paper Bitcoin," much like it arguably did with gold for decades? The concern is that giants are multiplying paper claims on the asset to absorb demand and contain the price. To understand this, we must look at market makers like Jane Street. They are not traditional investors betting on price increases; they are the "casinos" of the financial world. They profit from the "spread"—the tiny difference between buying and selling prices. As "Authorized Participants" (APs) for ETFs, they hold a unique privilege. While retail investors buy existing shares, APs are the only ones authorized to interact directly with issuers like BlackRock to create or destroy shares. The mechanics of Bitcoin ETFs have evolved. Initially, they operated on cash creations. By 2025, the SEC allowed "in-kind" structures, where APs deliver actual Bitcoin to the issuer in exchange for shares. This places APs at the heart of the plumbing connecting traditional finance to the Bitcoin spot market. They engage in constant arbitrage. If an ETF share price exceeds the value of the underlying Bitcoin, the AP buys spot Bitcoin, delivers it to the issuer, and sells the new ETF shares for a profit. Crucially, APs benefit from exemptions like "Bona Fide Market Making," allowing them to sell shares they do not yet own to maintain liquidity. This "regulatory magic" requires them to "Delta Hedge"—offsetting their risk by taking opposite positions in derivatives like futures. However, this creates a potential conflict of interest. If an AP knows they must buy Bitcoin later to settle a position, they have a financial incentive to see the price drop first. While there is no public proof that Jane Street operates this way, the theory of "dumping" to lower entry costs is a common suspicion in the industry. These suspicions are fueled by the firm’s history. In 2026, a lawsuit related to the collapse of Terraform Labs alleged that Jane Street used insider information in 2022. According to the complaint, an internal leak via a Telegram group alerted Jane Street that Terraform was withdrawing liquidity from its stablecoin, UST. Minutes later, a wallet linked to Jane Street allegedly dumped $85 million in UST. More significantly, they are accused of using this move as "ammunition" to trigger a wider collapse while holding massive short positions, netting colossal profits from a $40 billion disaster. Jane Street’s troubles extend beyond crypto. In 2025, Indian regulators seized nearly $560 million from the firm over alleged index manipulation. Since the firm reportedly made $4.3 billion during that period, such fines are often viewed by large institutions merely as a "tax on profit" rather than a deterrent. This history nourishes the distrust many feel toward Wall Street’s entry into Bitcoin. The primary concern remains the "financialization" of Bitcoin through "paper" versions. In the gold market, most trading happens via contracts where physical delivery rarely occurs. This allowed for "spoofing"—placing large fake orders to manipulate sentiment—as seen in the 2020 JP Morgan scandal. Critics fear Bitcoin is heading toward a similar fate where synthetic supply masks real demand. However, not all "paper Bitcoin" is equal. Spot ETFs like BlackRock’s are relatively safe because they are audited and prohibited from lending out their holdings. In contrast, derivatives like CME futures are often "cash-settled," meaning billions can be traded without a single satoshi moving on the blockchain. This "upper financial layer" can absorb capital that would otherwise drive up the spot price. Furthermore, the practice of "rehypothecation"—where platforms lend out customer deposits—can allow a single Bitcoin to be sold multiple times, artificially inflating the perceived supply. Despite these risks, Bitcoin has a massive advantage over gold: it is digital and easily auditable. Moving gold is a logistical nightmare, making physical verification rare. Bitcoin can be verified instantly. If an institution claims to have Bitcoin but has lent it out, a wave of withdrawals can trigger a "short squeeze," forcing the institution into bankruptcy or a desperate buy-back. This transparency acts as a natural check against long-term manipulation. Ultimately, while short-term price manipulation is possible through derivatives and strategic selling, Bitcoin’s growing market cap makes it increasingly difficult for any single actor to control. The current price volatility may be driven more by long-term holders selling rather than a grand conspiracy. While the "casino" can delay the impact of Bitcoin's scarcity, it cannot cancel it. For long-term investors, market manipulation is merely "noise." The fundamental value of Bitcoin lies in its decentralized protocol and open consensus, which remain far more resistant to corruption than the financial products built on top of them.