ShapeShift is an instant exchange for Litecoin, Bitcoin, Peercoin, Dogecoin, Darkcoin, and other cryptocoins.

It is the fastest way to trade between these digital currencies. An exchange between coins on ShapeShift takes only a few seconds, and no account is needed.

From start to finish you can change currencies in under ten seconds, no account required.

Let's assume you have Bitcoin and you want Litecoin. It goes like this:

1. Select Bitcoin as the input and Litecoin as the output

2. Provide your Litecoin address in the box, then click the Start button

3. ShapeShift will generate a Bitcoin deposit address. Send your Bitcoin there (don't send more than the Deposit Limit).

That's it. In a few moments, your Litecoin will be sent to you.

No emails or passwords. No lengthy sign­up process. No accounts. No bid and ask orders. No friction.

ShapeShift's goal is to be the fastest, most private, and most convenient way to swap digital currencies, and the exchange rate will always remain competitive.

site link: http://www.shapeshift.io/

Choose carefully any service that store and manage funds for you. Very few Bitcoin businesses offer enough insurances to be used to store money securely like a bank at this point.