Is There a Non-custodial Exchange That Supports Trezor Holding Arbitrum?

Problem scenario
Is there a non-custodial exchange that allows you to exchange Arbitrum coins with a Trezor wallet?

Solution
Yes. There are at least three: stealthex.io, Exchang.io and changenow.io.

Warning: Trezor does not natively support Arbitrum. Therefore you would have to import your wallet to something like MetaMask. You would have to give another party your recovery seed.

Will You Ever Be Able to Get ARB Sent to Your Wallet’s Ethereum Address?

One of the following apply to you:

Problem scenario #1
You sent ARB to an Ethereum address of you wallet. You cannot find it on the wallet. What should you do?

Problem scenario #2 (a more generic problem)
If you sent coins to an ethereum-based address of a Trezor wallet, but you are not using Metamask for those coins,

How Do You Handle the Prompt “Are you sure that this transaction doesn’t require a MEMO to be successful?” when You are Trying to Send XRP or XLM to a Trezor or Ledger wallet?

Problem scenario
You are trying to send Ripple coins to a Trezor wallet. You get a prompt like “Are you sure that this transaction doesn’t require a MEMO to be successful?” or “This transaction has no destination tag, are you sure it is not required to be successful?

Do you need to include a memo or “destination tag” when the Ripple coins or Stellar Lumens are going to a Trezor wallet or Ledger wallet?

Does BinanceUS Have Costly Fees when Withdrawing Coins?

Problem scenario
You want to know if Binance has high fees with withdrawing cryptocurrency. It seems that withdrawing USDT (Tether) is going to cost a significant amount. But you want it in your wallet. What should you do?

Possible Solution #1
Trade the USDT for XRP or some other coin.

As of March 2024, it seems that you can buy XRP with USDT on Binance and the withdrawal fee for putting XRP into a wallet would be much lower (than a comparable amount of USDT).

How Do You Troubleshoot the Trezor Message “Address is not valid”?

Problem scenario
With your Trezor wallet, you want to send cryptocurrency. You copied and pasted an alphanumeric address (and all the letters in it were lowercase). You get the message “address is not valid” when you try to send the cryptocurrency from your device. What should you do?

Possible solution
Case sensitivity can be an issue. Can you click “Convert to checksum address”?

What is a Smart Contract?

Question
You have heard of smart contracts in cryptocurrency contexts. What is a smart contract?

Answer
It is a automated or self-executing bid to buy or sell cryptocurrency when a condition is met (e.g., a price point is reached). As with stock trading with limit orders based on price, a smart contract is the equivalent with cryptocurrency. Usually the contract will execute exactly with the parameters you set forth or more in your favor (e.g.,