Many beginners think that coins are “stored” in their wallet, but the assets are actually recorded on the blockchain. What the wallet holds is the private key needed to create a signature. The private key proves you have the authorization to transfer assets, while the mnemonic phrase is typically the backup entry used to generate the private key. Once either is leaked, others can directly take your assets; if either is lost, the platform may not be able to help you recover them. Practical rule: back up your mnemonic phrase offline only—don’t take screenshots, don’t upload it to cloud drives, and don’t share it with anyone. For daily use, use a small hot wallet; for long-term holdings, consider a hardware wallet. Before transferring, verify the address and network, and do a small test transaction first. Remember: real security isn’t about “complex passwords,” but about ensuring your private key has never left your control.