Phoenix is an online, hot wallet.

You said large amount.

For large amount, please consider using cold wallet, offline. 

It can be done by using a hardware wallet such as cold card, bit box, jade, etc.


 

 I understand but if you were to hold it on a wallet with lightning which one would you choose. IsPhoenix the 'best' or are there others. Looks like Zeus beta wallet is pretty great.  

 Yes, among lightning wallets, I think it is a good choice. Check out mutiny wallet as well.