Honestly, cryptocurrency is simply a decentralized financial instrument based on blockchain, but over the past few years, the ecosystem has grown so much that it's easy to get lost in terminology without understanding the context. Let's figure out what everything is.

At its core, blockchain is an electronic database where information can be added, but almost impossible to delete or modify. Bitcoin was the first to implement this. It was the first cryptocurrency with its own blockchain, functioning as a public ledger that automatically verifies and records all transactions. The system exists only online and is protected by cryptography. After Bitcoin's launch, there was an explosion — hundreds of new projects, technologies, and different assets appeared.

Altcoins came after Bitcoin. In the early years, each cryptocurrency had its own blockchain, and they all differed from Bitcoin — faster, more anonymous, different mining algorithms, or other features. These assets are called alternative coins. They can be divided into three types: the first are coins based on Bitcoin but with modifications for new functions, like Litecoin or Dogecoin. The second are the result of modifying existing protocols, where the blockchain branches off and a new coin appears, such as Bitcoin Cash or Bitcoin Gold. The third are completely new developments without Bitcoin's code, like Ethereum, BNB, or Polkadot. The main difference with altcoins is that each has its own blockchain functioning as a decentralized ledger.

Now, about crypto tokens — this is a newer story. Before 2015, this didn't exist. Then Ethereum was launched, and they created functionality for digital assets without a separate blockchain. They operate within the main network, transferred between users, and traded on exchanges. Creating such cryptographic tokens is much easier than coins. You don't need to write a protocol from scratch or modify it — just follow the platform's instructions, like Ethereum, BNB Chain, or Cardano. Sometimes, programming isn't even necessary.

The terminology here is confusing. 'Cryptocurrency' can mean only Bitcoin, or Bitcoin plus altcoins, or all digital assets in general. 'Altcoin' — is it everything except Bitcoin, or only coins with their own blockchain? 'Token' — can it be an asset without a blockchain, or even a coin with its own blockchain, like ETH on Ethereum? To be precise technically, tokens are assets without a separate blockchain, while cryptocurrencies and altcoins are coins with their own.

Coins and crypto tokens are technically similar. Both use blockchain for accounting, both are protected by cryptography, both are fast and convenient, both can be used as a means of payment, both are divisible, both have issuance limits. But tokens have features: they don't have their own blockchain, are almost never mined, and are created for specific tasks within a project.

Decentralized governance — that's where the big difference lies. A cryptocurrency with its own blockchain develops according to an established algorithm, all processes are under the control of miners or validators, with no central authority that can change the rules. Tokens are different. Creators can modify the code themselves, or decisions are made by community voting, or everything is frozen according to rules. The third option is bad — the system doesn't develop. The second is considered optimal — this is true decentralization. Some projects go through all three stages. Miners in any case do not influence the internal processes of the project — this is the main difference.

Types of cryptographic tokens appeared later. Initially, regulators started requiring classification. The US SEC decided that some assets are securities, and applicable laws apply to them. Two main types emerged: security tokens and utility tokens.

A security token is essentially a security. It is created to raise funds for project development. Investors receive a share of profits, rights to assets, dividends, voting rights. Later, tokenized assets appeared — the same security tokens but backed by gold, stocks, real estate. This is an innovative approach to investing with high security and accessibility.

A utility token is a service token, not a security. It is used to access services within a project. One major exchange, for example, offers discounts on fees to holders of its utility token. Utility tokens have many applications: access to services, payments, exchanges, fees, subscriptions, community management, rewards, integration with external systems, decentralized applications, business models, exchange for virtual and physical items, voting, staking, bonuses, security. Transfers can be between users, from the administration to users, or from developers to users. Profit from holding utility tokens is not guaranteed unless you stake them.

In reality, these two types of tokens can look similar. Utility tokens are traded on exchanges, their prices fluctuate, and they can generate profit or loss. Security tokens sometimes have useful functions — they work as a payment method or provide access to services. But security tokens are less popular — issuing them requires complex legal procedures.

There are also other types of tokens. Stablecoins are cryptocurrencies pegged to stable assets like fiat, gold, or securities. They can be security, utility, or just a means of payment. It all depends on the project's characteristics. NFTs are unique assets, each in a single copy. They are used to tokenize digital objects — paintings, music, videos, game items. They grant rights to use and access. Functionally, they are utility tokens, but if they are art pieces, their value can increase like security tokens. Although in most countries, NFTs are not yet regulated as securities.

That’s the story with crypto tokens and everything else. It’s complicated, but you can understand it.