Ethereum (ETH) is often considered a good pick by many investors and experts for several reasons:

1. Smart Contract Platform: Ethereum is not just a cryptocurrency; it's a decentralized platform that allows developers to build and deploy smart contracts and decentralized applications (DApps). This functionality has led to the development of a vibrant ecosystem of projects, tokens, and applications on the Ethereum blockchain.

2. First-Mover Advantage: Ethereum was the first blockchain to introduce smart contracts, making it a pioneer in the field of decentralized applications. Its early adoption and network effect have given it a significant advantage over many competitors.

3. Large Developer Community: Ethereum has one of the largest and most active developer communities in the cryptocurrency space. This community is continuously working on improving the platform, scaling solutions, and innovating in areas like DeFi (Decentralized Finance), NFTs (Non-Fungible Tokens), and more.

4. Upcoming Upgrades: Ethereum is undergoing significant upgrades to improve its scalability, security, and sustainability. The transition from a proof-of-work (PoW) to a proof-of-stake (PoS) consensus mechanism (Ethereum 2.0) aims to make the network more energy-efficient and scalable.

5. DeFi and NFTs: Ethereum is the primary platform for DeFi projects, enabling users to borrow, lend, trade, and earn interest on cryptocurrencies without traditional intermediaries. Additionally, Ethereum is the go-to platform for NFTs, which have gained immense popularity in areas like art, gaming, and entertainment.

6. Institutional Interest: Ethereum has gained attention from institutional investors, similar to Bitcoin. Institutional adoption can provide stability and liquidity to the Ethereum market.

7. Growing Adoption: Ethereum is being adopted for a wide range of use cases beyond DeFi and NFTs, including supply chain management, identity verification, and more. This broadening of use cases enhances its utility and long-term potential.

8. Network Security: Ethereum's high network security and decentralization make it an attractive platform for developers and users concerned about the security of their assets and applications.

9. Liquidity: Ethereum is one of the most liquid cryptocurrencies, making it easy to buy, sell, and trade on various exchanges.

10. Long-Term Vision: Ethereum's development team, led by the Ethereum Foundation and supported by many independent developers and organizations, has a clear long-term vision for the platform's evolution and improvement.

Despite these strengths, it's essential to note that Ethereum also faces challenges, such as scalability issues and competition from other smart contract platforms. Additionally, the cryptocurrency market is highly volatile, and past performance is not indicative of future results. Before investing in Ethereum or any cryptocurrency, it's crucial to conduct thorough research and consider your investment goals and risk tolerance.

On the other hand Bitcoin (BTC) is also considered a good pick by many investors and experts for several compelling reasons:

1. First and Most Recognized Cryptocurrency: Bitcoin was the first cryptocurrency ever created, and it remains the most recognized and widely adopted digital currency. Its first-mover advantage has cemented its status as a digital gold standard in the cryptocurrency world.

2. Store of Value: Bitcoin is often referred to as "digital gold" because, like gold, it is seen as a store of value and a hedge against inflation. Its limited supply (21 million coins) and deflationary nature make it an attractive option for those seeking to preserve their wealth.

3. Decentralization: Bitcoin operates on a decentralized network of nodes and miners. It is not controlled by any single entity, government, or corporation, which adds to its appeal as a censorship-resistant form of money.

4. Scarcity: Bitcoin's capped supply of 21 million coins ensures scarcity, which can drive demand and potentially lead to price appreciation over time.

5. Security: Bitcoin's proof-of-work (PoW) consensus mechanism is highly secure, and the network has a long history of robust security. It has never been hacked at the protocol level.

6. Liquidity: Bitcoin is one of the most liquid cryptocurrencies, with high trading volumes and widespread availability on numerous cryptocurrency exchanges.

7. Institutional Adoption: Institutional investors, including hedge funds, family offices, and publicly traded companies, have started to allocate a portion of their portfolios to Bitcoin. This institutional adoption is viewed as a sign of growing confidence in the asset.

8. Global Acceptance: Bitcoin is accepted by a growing number of merchants and businesses around the world, making it increasingly useful for everyday transactions.

9. Hedge Against Economic Uncertainty: Bitcoin is often seen as a hedge against economic instability and currency devaluation. In times of economic turmoil or hyperinflation, some investors turn to Bitcoin as a safe haven asset.

10. Maturing Ecosystem: The Bitcoin ecosystem has matured significantly over the years, with improvements in security, usability, and infrastructure. This includes the development of Bitcoin wallets, payment processors, and custody solutions.

11. Halving Events: Approximately every four years, Bitcoin undergoes a "halving" event where the block reward for miners is reduced by half. This event has historically been followed by periods of increased price appreciation due to reduced supply issuance.

12. Longevity and Trust: Bitcoin has been in existence since 2009 and has stood the test of time. Its continued operation and resilience have built trust among investors.

Despite these strengths, it's important to remember that Bitcoin, like all investments, carries risks. Its price can be highly volatile, and past performance is not indicative of future results. Before investing in Bitcoin, consider your financial goals, risk tolerance, and conduct thorough research to make informed decisions. Additionally, it's advisable to seek guidance from financial advisors with expertise in cryptocurrencies if you're new to the space.