I. Underlying Asset Value Logic (Most Fundamental Difference)

1. Stock Market
Stocks correspond to shares in a listed company, which has revenue, products, cash flow, and fixed assets. Long-term stock prices are supported by corporate profits, dividends, and performance growth; even if stock prices fall, the company's physical assets still exist, providing a liquidation safety net. Regulatory requirements mandate financial disclosures and audits, making information verifiable.

2. Cryptocurrency Circle
99% of tokens have no operational entity, no revenue, and no dividends; BTC is unprofitable, and most altcoins only have whitepapers without real-world revenue. Prices rely entirely on consensus, new capital inflows, and emotional speculation. Once funding dries up or consensus collapses, token value can drop to zero with no safety assets backing them.

II. Differences in Trading Rules

1. Trading Hours
Stock Market: A-shares open during fixed hours Monday to Friday, closed on holidays, providing a cooling-off period; US stocks also close on weekends.
Crypto Circle: Trading occurs 24/7, 365 days a year, with no circuit breakers or market closures; emotional sell-offs and pump-and-dump can happen at any time.

2. Price Fluctuation Limits
Stock Market: A-shares have ±10% daily limit, Sci-Tech Innovation Board 20%, with circuit breakers in extreme conditions, preventing single-day halts or tenfold surges.
Crypto Circle: No fluctuation limits; daily moves of 50%, doubling, or dropping to zero are common.

3. Leverage Ecosystem
Stock Market: Formal margin trading leverage is low (1-2x), with high thresholds and strict regulation.
Crypto Circle: Exchanges freely offer 10–100x leverage; a few hundred dollars can open high-leverage contracts, and liquidation is routine.

III. Regulation and Fund Security (Most Critical)

1. Stock Market: Strong regulation by securities commissions worldwide, licensed brokerages, third-party fund custody, illegal activities like insider trading, market manipulation, and price rigging are prohibited. Losses are part of investment risk, and victims can report crimes to seek rights.

2. Crypto Circle: China fully bans issuance and trading of virtual currency tokens; no compliant exchanges operate domestically. Platforms without licenses may cut internet connections, manipulate charts, or run off with funds. Market manipulation, "rabbits" (small traders), and pump-and-dump schemes lack legal constraints; victims of principal theft have little legal recourse.

IV. Participant Structure and Speculation Styles

1. Stock Market: High proportion of institutional investors (funds, social security, foreign capital), with some long-term value investing; capital flows are relatively rational. Thematic speculation exists but is grounded in fundamentals.

2. Crypto Circle: Dominated by retail investors and speculators, mostly engaging in short-term trading, meme coins, and news-driven hype; project teams can issue tokens at low cost, pre-sell, and dump on retail investors with minimal barriers.

V. Supply of Chips (Ownership)

Stocks: Additional issuance and lock-up releases require regulatory approval; circulating shares are controllable.
Tokens: Project teams hold large unlocked tokens, capable of large-scale dumping at any time; many unlocking details are not publicly disclosed.

Concise Summary

Stock Market: Earns from company growth, with rules, regulation, and physical assets as safety nets.
Crypto Speculation: Earns from new entrants, with no rules, no regulation, and no underlying safety net; game theory outweighs investment fundamentals.