Are cryptocurrencies secure? (Bitcoin, Litecoin, etc.)

Yes. Cryptocurrencies security and privacy measures are second-to-none.

Security

• You are in total control of your funds - all cryptocurrency (Bitcoin, Litecoin, etc.) information is stored in your Digital Wallet on your iPhone or Android, and not on a server. 
• Nobody else can access or see your funds, without your permission.
• All cryptocurrency transactions are logged with a unique address consisting of numbers and letters on their own private blockchain.
• This ledger is private, and gives you peace of mind during transactions. 
• The verification process, as well as the privacy and security measures ensure that all transactions secure.

Privacy

• No personal information is kept on the ledger whatsoever. Only the cryptocurrency addresses used in the transaction. 
• Every transaction you send or receive is completely private between you and the other party.