The European Securities and Markets Authority (ESMA) has issued a stark warning that heavy artificial-intelligence spending is inflating tech valuations, creating a potential stock sell-off that could disproportionately impact closely tied crypto assets. In a risk report released Thursday, the regulator emphasized that Bitcoin fell 35% in the first half of 2026, with smaller tokens losing as much as 61%, while U.S. spot bitcoin ETFs experienced more than $5.5 billion in outflows. This macro caution coincides with ESMA’s scrutiny of leading prediction market platforms, including Polymarket and Kalshi, which currently lack the necessary authorization to serve users in the European Union.

Market Context

The regulatory scrutiny arrives as several EU member states and non-EU jurisdictions have already moved to restrict access to prediction markets. France, for instance, ordered internet service providers to block access to Polymarket in July, following similar bans in Switzerland, Poland, Singapore, Belgium, Portugal, Spain, and Brazil. Despite these national-level blocks, ESMA noted that both Polymarket and Kalshi prohibit trading from only some EU countries, leaving others off their restricted lists. The regulator questioned the effectiveness of these partial bans, particularly regarding the ability of platforms to enforce restrictions against users employing virtual private networks (VPNs) to conceal their locations.

Analysis

ESMA’s analysis hinges on the classification of event contracts, which can fall under three distinct regulatory frameworks: existing EU binary-options bans, the Markets in Crypto-Assets (MiCA) regulation, or national gambling laws. If contracts qualify as financial instruments, they generally face prohibitions on marketing and sale to retail investors under national binary-options measures. If based on distributed ledger technology and not financial instruments, they may fall under MiCA. Otherwise, they are subject to national gambling regulations. The regulator highlighted that Europe’s market abuse rules can only address misconduct if the contracts fall within the financial regulatory perimeter, leaving a significant gap in oversight for unauthorized platforms. Furthermore, ESMA linked crypto market stability to the broader tech sector, noting that large investors may sell riskier, liquid holdings like crypto to raise cash if AI investments disappoint or debt pressures trigger a technology sell-off.

Key Numbers

- Bitcoin fell 35% in the first half of 2026, while smaller tokens lost as much as 61%.

- U.S. spot bitcoin ETFs experienced more than $5.5 billion in outflows.

- Spot ether funds saw nearly $2 billion in outflows.

- France, Switzerland, Poland, Singapore, Belgium, Portugal, Spain, and Brazil have implemented blocks or restrictions on prediction market access.

What to Watch

Traders should monitor whether Polymarket and Kalshi expand their restricted jurisdiction lists to include all EU member states, as ESMA explicitly stated it is unclear why all states are not currently included. The regulatory classification of event contracts remains a critical variable; if EU authorities enforce stricter binary-option bans or clarify MiCA applicability, the platforms may face complete exclusion from key European markets. Additionally, market participants must watch for any signs of a tech sector sell-off, as ESMA warned that crypto assets are more exposed to such shocks than in past cycles due to increased integration with traditional finance via spot ETFs and institutional custody. Pablo Hernandez of the Bank for International Settlements compared the current AI boom to the dot-com era, suggesting that capital inflows may exceed eventual returns, a dynamic that could precipitate the volatility ESMA forecasts.