Please specify what kind of wallet would you want to use, an offline wallet for bitcoin or online wallet that has support also to more other altcoins.

I can suggest you to use is the bitcoin core wallet. This is one of the leading offline wallet for me and the safest wallet if you want to store your bitcoin for a long time.
Here's the link Bitcoin Core

For online wallet, there are a lot of choices you can choose from but I preffer using blockchain.info