Why do you sometimes have to wait a week to transfer coins from a Layer 2 network back to the mainnet?
Rollups are currently the most popular Layer 2 solution. They fall into two categories: Optimistic Rollups and ZK Rollups.
When depositing or withdrawing, make sure you select the right network: assets on different networks are separate, even if they use the same address.
$ARB is the governance token of the Arbitrum Layer 2 network.
Feel free to share any additional thoughts in the comments.

#ARB

Use this for reference only. Proceed at your own risk.