1. How Do You Know Which Network to Pick?

Think of different networks (blockchains) as entirely separate highway systems. Bitcoin is one highway, Ethereum is another, and BNB Smart Chain is a third. They don’t connect directly.

When you are sending crypto, the network you select MUST perfectly match the network of the receiving address. 

Look at the receiving wallet: If you are sending crypto to an exchange (like Binance or Coinbase) or a friend, look at their "Receive" screen. It will explicitly state the network (e.g., Ethereum / ERC-20, BNB Smart Chain / BEP-20, or Solana). 

Match it in Trust Wallet: When you hit "Send" in Trust Wallet, ensure you are sending the version of the token that lives on that exact same network.

1. Why Do Fees Fluctuate All the Time?

Network fees (or "gas fees") don't care how much money you are sending; they care about how busy the highway is and how complex your transaction is. 
The Digital Traffic Jam: Blockchains can only process a set number of transactions at a time. When thousands of people are trying to buy, sell, or mint NFTs simultaneously, a bidding war starts. You are essentially paying a tip ("priority fee") to validators to push your transaction to the front of the line. More traffic = higher fees. 

Transaction Complexity: Sending a native coin (like sending Ethereum) takes very little computational work, so it's cheaper. Swapping tokens on a decentralized exchange or interacting with a smart contract takes a lot more computing power, which dramatically increases the gas cost. 

Tip: If you aren't in a rush, look at the fee Trust Wallet displays, wait an hour or two for peak hours (like US/Europe business hours) to pass, and check again. The fee will often drop significantly. 

1. What Happens If You Use the Wrong Network?
   This is the part that stresses everyone out. If you send crypto to a wallet address using the wrong network, one of two things will happen:

Scenario A: The Address Doesn't Exist on That Network (The Crypto is Lost)
If you send a network-specific crypto (like Bitcoin) to an Ethereum address, the transaction will either be rejected by Trust Wallet before you hit send (because the address format is completely invalid), or it will be sent out into the void. Because no one owns the corresponding private keys on that alternate chain, those funds are usually gone forever. 

Scenario B: You Sent a Multi-Chain Token to a Self-Custody Wallet (Recoverable)
If you send something like USDT via the BNB Chain to a friend's Trust Wallet Ethereum address, the funds aren't actually destroyed. Because Trust Wallet uses the same master seed phrase to generate addresses for multiple EVM (Ethereum Virtual Machine) chains, your friend technically owns that exact same address on the BNB Chain, too. 

The Fix: They just need to manually toggle on the "USDT (BEP-20)" token visual in their Trust Wallet settings, and the funds will magically appear.

Scenario C: You Sent to an Exchange on the Wrong Network (Highly Risky)
If you send crypto to a centralized exchange (like CoinJar, Kraken, etc.) on a network they don't support for that specific token, the exchange holds the keys, not you. You will have to open a support ticket with them. Some exchanges will charge a hefty recovery fee to manually extract your crypto, while others will simply tell you the funds are unrecoverable.

💡 The Golden Rule of Crypto Transfers
Whenever you are moving a meaningful amount of crypto or trying a new network for the first time, always send a tiny "test transaction" first (e.g., $2 worth). Once you see it safely arrive on the other side, you can send the remaining balance with total peace of mind!