Ethereum and Litecoin wallets

[Explore597]

Hello again and an another newbie question here..   

I heard that if you move your ethereum into your wallet before the entire blockchain is downloaded, that your money will be lost?

My Ethereum and Litecoin wallets seems to take forever to get done with the `node needs to sync` on Ethereum and `syncing with the network` on the Litecoin wallet.

Is this the downloading of the blockchain or is it safe to move my coins in the wallets?

Thank you!