USDC is safe. It is jointly issued by Circle and Coinbase. It is regulated by the US FinCEN. Its reserve assets are US dollar cash and US bonds. It is regularly audited independently, with high transparency. 1. USDC has strong compliance and is strictly regulated by the United States; 2. The reserve asset structure is clear, supported by cash and Treasury bonds; 3. The audit frequency is high and transparent; 4. It is widely accepted by institutions in many countries and is suitable for scenarios such as DeFi and compliant payments. In comparison, USDT is issued by Tether, with an offshore registration location, insufficient early disclosure, and reserves with low liquidity assets such as commercial paper. Although the circulation volume is large, the regulatory recognition is slightly low, and it is suitable for users who pay attention to liquidity. Both have their own advantages, and the choice should be determined based on the purpose and preferences of use.

USDT is not suitable as a traditional value-added asset investment, but can be used as an instrumental asset to participate in financial management. 1. The USDT price is anchored to the US dollar and does not have room for appreciation. It is mainly suitable for trading, payment and risk aversion; 2. Suitable for risk aversion investors, arbitrage traders and investors waiting for entry opportunities; 3. Stable returns can be obtained through DeFi pledge, CeFi currency deposit, liquidity provision, etc.; 4. Be wary of centralized risks, regulatory changes and counterfeit currency risks; 5. In summary, USDT is a good risk aversion and transitional asset. If you pursue stable returns, it should be combined with its use in financial management scenarios, rather than expecting its own appreciation.

PYUSD is not suitable as a speculative asset, but is suitable for payment and funding stability. 1.PYUSD is issued by PayPal, anchored to the US dollar, and has no appreciation potential; 2. It is suitable for short-term value preservation and avoiding crypto market fluctuations; 3. Currently supports Coinbase, Kraken, Binance US, Huobi and PayPal wallet transactions; 4. Compliance and security should be given priority when choosing a platform.

DAI is safe, but has been briefly deaned. 1. DAI is generated by over-collateralized crypto assets, with a collateral rate usually higher than 150%; 2. Automatically execute a clearing mechanism for smart contracts to ensure the stability of the system; 3. Core support assets include ETH, WBTC, USDC and other strong liquidity tokens; 4. Historically, during the "Black Thursday" in 2020, a short period of deansted to US$1.1, but no systematic collapse occurred; 5. The MakerDAO community improves stability by increasing the types of collaterals and introducing USDC reserves; 6. Compared with centralized stablecoins, DAI has higher transparency and trustworthiness characteristics, but still faces potential risks in extreme market conditions.

The yield keyword is used to create generators, generate values on demand, and save memory. 1. Replace return to generate finite sequences, such as Fibonacci sequences; 2. Implement infinite sequences, such as natural sequences; 3. Process big data or file readings, and process them line by line to avoid memory overflow; 4. Note that the generator can only traverse once, and can be called by next() or for loop.

The most promising small currencies in 2025 include Arbitrum (ARB), Render (RNDR), Sui (SUI), Ondo Finance (ONDO), and Immutable (IMX). 1.Arbitrum, as an Ethereum Layer 2 expansion solution, occupies a dominant market position with its technological advantages and ecological scale; 2. Render combines AI and decentralized GPU rendering to meet the rapidly growing computing power needs; 3. Sui is based on a high-performance public chain architecture, suitable for large-scale application scenarios such as games and social networking; 4. Ondo Finance promotes the tokenization of real-world assets, connecting traditional finance and digital assets; 5. Immu

The stablecoin ecosystem will be more mature and diversified. For most users, fiat-staking stablecoins are still the first choice for their simplicity and high liquidity. Users who pursue higher decentralization and transparency can choose to crypto assets to pledge stablecoins. Mixed and algorithmic stablecoins represent the industry's exploration direction, and you must fully understand their high-risk characteristics before participating. With the gradual implementation of CBDC, it will also play an important role in specific scenarios. Which stablecoin to choose ultimately depends on your comprehensive consideration of security, degree of decentralization, capital efficiency, and risk.

Five mainstream earning stablecoins include DAI, USDe, sDAI, fUSDC and stUSDT. 1. DAI provides floating income to users through Dai savings rate (DSR), and funds come from stable fees and liquidation fines paid by borrowers; 2. USDe earns high returns through ETH long and short positions hedging to earn capital rates and Ethereum pledge rewards, but there is a risk of negative capital rates; 3. sDAI is a "tokenized DSR" issued by Spark protocol, which continuously accumulates DSR returns while maintaining liquidity; 4. fUSDC is issued by Flux Finance, and the income comes from interest provided to institutional counterparties on excess mortgage loans; 5. stUSDT is based on real-world funds