How to read Bitcoin, Ethereum, Solana, and BNB before you trade

These four names are often listed together and then treated as “safe because they are famous”. Famous only means many people already trade them. Each price can still fall quickly. Apply the checklist in how to choose a coin to every name below. The order of the headings is not an order to buy.

Disclaimer: this is not a recommendation to buy, sell, or hold. Supply figures and fees change. Read the official docs on the day you check. You can lose the entire amount you use to trade.

1. How to use this page

For each asset, fill four lines in your notes:

I understand the use, in one sentence.
I checked supply in an official source, on this date: …
The risk I accept on purpose: …
I exit if …, and the most I can lose is: …

If one line is empty, you are not ready to place an order in that asset, even if the chart is busy.

2. Bitcoin (BTC)

Bitcoin was designed as digital money that moves between people without a bank account. In practice many people treat it as an asset with a limited supply. A long-standing protocol rule: there will be no more than 21 million bitcoin, and new bitcoin is issued on a schedule that slows down (roughly halved about every four years). No single company “owns” Bitcoin. Rule changes depend on the people running node software.

Check this before you trade:

You are buying BTC, not a token with a similar name.
You understand an exchange balance can be frozen by the exchange, while bitcoin in your own wallet follows the keys you store. Lose the recovery phrase and the funds are gone. Bitcoin has no customer support desk.
A price that rose in the past does not decide tomorrow. Large swings are a property of this market, not a temporary glitch that is sure to end.

An honest cancel rule: “I exit if the loss hits the amount of money I wrote down”, not “I exit when someone in a group says it is enough”.

3. Ethereum (ETH)

Ethereum is a network for programs that run on it (smart contracts). ETH pays for that computation, called gas. Since the move to proof-of-stake, validators who lock ETH secure the network, not miners with hardware as in the early design. Unlike Bitcoin, ETH has no hard cap of 21 million. Some new ETH is issued to validators, and some transaction fees are burned. Whether supply is rising or falling on a given day has to be read from an official data source that day, not from this article.

Check this:

You can tell ETH apart from a token someone else issued on Ethereum. The name of a busy app is not the name ETH.
Gas fees rise when the network is busy. A small order can be eaten by fees if you flip in and out.
An app on Ethereum can have its own bug. A loss in that app is not automatically “Ethereum is broken”, but your money is still gone.

4. Solana (SOL)

Solana is a network aimed at fast transactions and low fees. SOL pays transaction fees and is used to stake with validators. What makes it different from Bitcoin and Ethereum is also what makes the risk different: the design favors speed, and the network has a history of service interruptions. Before you trade, open Solana’s official status page and read whether the network is operating, then read how the project explains outages that already happened. Do not rely on someone else’s summary.

Check this:

The address and the network when you withdraw SOL. The wrong network is not “automatically returned”.
Validators and large holders have influence. That is concentration risk, not a detail you can ignore because transfers feel fast.
An app on Solana can fail on its own. Try first with a small amount you already budgeted to lose.

5. BNB

BNB is tied to the Binance ecosystem and BNB Chain. Uses people usually cite: paying fees on BNB Chain, and trading-fee discounts on Binance for accounts that meet the conditions shown on their screen. Because that use sits with one corporate group and a network they operate, the extra risk is counterparty risk: a rule change, a regional restriction, or an outage at their services shows up directly in BNB. That is different from Bitcoin, which has no single company’s service desk.

Check this:

You can tell BNB apart from bitcoin and from other tokens sold on Binance. The wrong button is an expensive mistake.
Fee-discount terms are read on the official fee page today. Do not assume an old discount still applies.
If a Binance account is locked, BNB sitting there cannot be moved until the account issue is finished. Keep only an amount inside your loss limit.

6. Compare the four names without crowning a winner

Fill this short list yourself. Leave a cell empty when you cannot fill it from an official source.

BTC: a 21 million cap is written into the protocol. There is no issuing company. Main risks: price, key storage, and the rules in your country.
ETH: pays for computation on Ethereum. No hard supply cap. Extra risks: gas fees and bugs in apps built on top.
SOL: fees and staking on Solana. Extra risks: network interruptions and concentration.
BNB: fees in the Binance / BNB Chain ecosystem. Extra risk: dependence on one corporate group.

Try at most one first, with an amount under the limit you already wrote in how to choose a coin. All four on the same day usually means you have not finished judging any of them.

7. After the name is chosen, read the price like this

Pick the entry price you are willing to pay, not the price that is flashing.
Pick the exit price or condition before the order is placed.
Order size follows the money limit, not “all in if I feel sure”.
Keep a copy of your reason. Tomorrow, if you want to move the limit, you need a new written reason. Regret is not a new reason.

This page is finished when your notes are filled in, not when you find the name that is “the best”. None of the four removes the chance of a loss.

Other basics: fake sites · rejected KYC · 2FA and withdrawals · missing deposits · comparing exchanges · choosing a coin · BTC, ETH, SOL, BNB.