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Beyond Bitcoin and Ethereum, crypto has spawned entire categories of new technology and new speculation. This page covers what they are, how they actually work, and how to think about them without getting swept up in hype.
An NFT is a unique token on a blockchain. Unlike Bitcoin, where every coin is interchangeable, each NFT is distinct. They're most commonly used for digital art, collectibles, and memberships, but the underlying technology has broader applications.
The NFT market went through a massive bubble in 2021-2022. Most projects that traded for thousands of dollars are now worth fractions of a cent. The lesson is not that NFTs are worthless. It's that speculation destroys value and fundamentals eventually reassert.
If you're interested in NFTs, understand what you're buying. Is it art you genuinely want to own? A membership with real utility? Access to a community? Or is it something you're buying hoping to flip for profit? The first three are fine. The fourth usually ends badly.
DeFi refers to financial applications built on blockchains, primarily Ethereum, that operate without intermediaries. No banks, no brokers, no permission needed. Smart contracts handle everything automatically.
The main categories:
DeFi yields are real but they come with real risks. Smart contracts can have bugs. Protocols can be exploited. A single vulnerability can drain millions overnight. Never put more into DeFi than you can afford to lose, and stick to established protocols with long track records.
Stablecoins are cryptocurrencies pegged to a stable asset, usually the US dollar. USDC and USDT are the two largest. They're essential infrastructure for crypto: they let you hold dollars on-chain, trade in and out of positions without going to a bank, and earn yield in DeFi.
Not all stablecoins are equal. Some are backed by actual dollar reserves (USDC). Some are backed by other crypto assets algorithmically (these have a history of failing). Stick to the ones with transparent reserves and regulatory oversight.
Ethereum's main network is secure but slow and expensive. Layer 2s are networks built on top of Ethereum that process transactions faster and cheaper, then settle them on the main chain. Examples: Arbitrum, Optimism, Base.
If you're using Ethereum for anything beyond holding, you'll likely use a Layer 2. Transaction fees drop from $5-20 to pennies. The tradeoff is slightly more complexity and some security assumptions.
Crypto has recurring narrative cycles. AI and crypto. Real-world asset tokenization. Modular blockchains. Restaking. Each cycle brings genuine innovation mixed with excessive speculation.
The way to approach new narratives: understand the technology first. Is it solving a real problem? Does it have real users? Or is it a token looking for a use case? The projects that survive are the ones that build something useful, not the ones that market the hardest.
If a new narrative requires you to FOMO in immediately or you'll "miss out," it's almost certainly too late. The people who profit from narratives are the ones who were building before the narrative existed.
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