There are over 10,000 cryptocurrencies in existence, but the vast majority have no meaningful use or trading volume. Understanding the major categories — Bitcoin, Ethereum, stablecoins, altcoins, and DeFi tokens — is the starting point for anyone trying to make sense of the crypto market.
Disclaimer: Cryptocurrency is highly speculative. This article is educational only and does not constitute investment advice. Consult a licensed financial advisor before investing.
Major Types of Cryptocurrency at a Glance
| Category | Examples | Primary Purpose | Risk Level |
|---|---|---|---|
| Bitcoin | BTC | Store of value, digital gold | High (but lowest in crypto) |
| Smart contract platforms | ETH, SOL, ADA, AVAX | Programmable blockchain apps | High |
| Stablecoins | USDC, USDT, DAI | Price stability, trading, payments | Low-moderate (peg risk) |
| Altcoins | LTC, XRP, DOT, LINK | Various (payments, infrastructure) | Very High |
| DeFi tokens | UNI, AAVE, CRV | Governance, protocol utility | Extremely High |
| Memecoins | DOGE, SHIB, PEPE | Speculation, internet culture | Extremely High |
| Utility tokens | NFT platforms, gaming tokens | Access to specific apps | Very High |
1. Bitcoin (BTC)
Created: 2009 by the pseudonymous Satoshi Nakamoto Market cap (May 2026): ~$1.8 trillion Current price: ~$90,000–$95,000
Bitcoin is the original cryptocurrency and remains by far the largest by market capitalization. Its key characteristics:
- Fixed supply: Only 21 million BTC will ever exist — “mining” creates new coins until the last is mined around 2140
- Decentralized: No central authority controls Bitcoin; it runs on a global network of computers
- Proof of Work: Bitcoin miners compete to validate transactions using computational power
- Store of value: Most holders treat Bitcoin like digital gold — a hedge against inflation and currency debasement
- ETF access: Spot Bitcoin ETFs (IBIT, FBTC, BITB) now trade on US stock exchanges as of 2024
Bitcoin accounts for roughly 50%–55% of the total crypto market cap, a figure called “Bitcoin dominance.”
2. Ethereum (ETH)
Created: 2015 by Vitalik Buterin and others Market cap (May 2026): ~$280 billion Current price: ~$2,300–$2,500
Ethereum is the second-largest cryptocurrency and the dominant smart contract platform. Unlike Bitcoin, Ethereum is a programmable blockchain — developers can build applications on top of it.
| Feature | Bitcoin | Ethereum |
|---|---|---|
| Primary use | Store of value | Smart contracts, apps |
| Supply | Capped at 21M | No hard cap; deflationary burning mechanism |
| Consensus | Proof of Work | Proof of Stake (since “The Merge,” 2022) |
| Energy use | High | ~99.9% lower than pre-Merge |
| Ecosystem | Limited | DeFi, NFTs, stablecoins, DAOs |
Ethereum’s value comes from being the base layer for: DeFi lending protocols (Aave, Compound), decentralized exchanges (Uniswap), NFT platforms, and stablecoins (USDC and USDT run as ERC-20 tokens on Ethereum).
3. Stablecoins
Stablecoins are cryptocurrencies designed to maintain a stable price, typically $1.00 USD. They allow users to hold value in crypto wallets without exposure to price volatility — useful for trading, international transfers, and DeFi.
| Stablecoin | Type | Backing | Market Cap (May 2026) |
|---|---|---|---|
| Tether (USDT) | Fiat-backed | USD, Treasury bills, commercial paper | ~$110B |
| USD Coin (USDC) | Fiat-backed | USD held in regulated financial institutions | ~$45B |
| DAI | Crypto-backed | Collateralized by ETH and other crypto | ~$5B |
| FDUSD | Fiat-backed | USD | ~$3B |
Risk: Stablecoins are NOT FDIC-insured. If the issuer cannot honor redemptions, the peg can break — as TerraUSD (UST) did catastrophically in 2022, losing nearly all value in days and wiping out ~$40 billion in market cap.
4. Altcoins: Smart Contract Competitors
“Altcoin” means any cryptocurrency other than Bitcoin. The most significant altcoins are smart contract platforms competing with Ethereum:
| Cryptocurrency | Ticker | Focus | Approx. Market Cap |
|---|---|---|---|
| Solana | SOL | Fast, low-cost transactions | ~$65B |
| BNB | BNB | Binance ecosystem, low-fee trading | ~$85B |
| XRP | XRP | Cross-border payments, financial institutions | ~$120B |
| Cardano | ADA | Academic research-driven blockchain | ~$13B |
| Avalanche | AVAX | Fast finality, subnets | ~$10B |
| Polkadot | DOT | Blockchain interoperability | ~$7B |
| Chainlink | LINK | Blockchain data oracles | ~$9B |
Altcoins are more speculative than Bitcoin or Ethereum — many have experienced 90%+ drawdowns from their peaks and never recovered.
5. DeFi Tokens
Decentralized Finance (DeFi) tokens are used for governance and utility within blockchain-based financial protocols. Holders of governance tokens can vote on protocol changes.
| Protocol | Token | What It Does |
|---|---|---|
| Uniswap | UNI | Decentralized exchange governance |
| Aave | AAVE | Lending/borrowing protocol governance |
| Compound | COMP | Lending protocol governance |
| Curve Finance | CRV | Stablecoin DEX governance |
| MakerDAO | MKR | DAI stablecoin governance |
DeFi tokens are extremely high-risk — protocol vulnerabilities, exploits, and regulatory actions can cause rapid losses.
6. Memecoins
Memecoins have no intrinsic utility and derive value entirely from social media attention and speculative trading.
| Memecoin | Ticker | Origin | Peak Gain |
|---|---|---|---|
| Dogecoin | DOGE | 2013; Shiba Inu meme | +12,000% (2021) |
| Shiba Inu | SHIB | 2020; “DOGE killer” | +45,000,000% (2021) |
| Pepe | PEPE | 2023; Pepe the Frog meme | +7,000% (2023) |
Memecoins can produce extraordinary short-term gains but most eventually lose 95%+ of their value. They are purely speculative.
How Crypto Is Taxed (All Types)
The IRS treats all cryptocurrency as property. This applies to every type — Bitcoin, Ethereum, stablecoins, altcoins, and DeFi tokens.
| Transaction | Tax Treatment |
|---|---|
| Sell crypto for profit | Capital gains tax (short-term if held < 1 year; long-term if ≥ 1 year) |
| Trade one crypto for another | Taxable event — capital gains/loss at time of trade |
| Receive crypto as payment | Ordinary income at fair market value |
| Mine or stake crypto | Ordinary income when received |
| Buy crypto with USD | Not taxable |
| Hold crypto | Not taxable |
Stablecoins are also taxable property — if USDC slightly fluctuates from $1.00 and you sell, that is technically a taxable event.
Before buying any cryptocurrency, see before you buy crypto for the risk framework and security checklist. For choosing a platform to buy, see best crypto exchanges for security, fees, and coin availability. For the broader context of crypto as an asset class, see types of investments — including where crypto fits in a diversified portfolio.
The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy