There are several websites that claim that they are 'wallets' to store Bitcoin. Some claim that they are 'Exchange' where people can trade Bitcoin. There are also those who claim to be both, but usually things like this are fraudulent sites. Usually they ask users to register and deposit Bitcoin or local currency then they run away the money. Things you need to pay attention to Use the services of a trusted and registered company:

Make sure you can verify the identity of the employee / company owner
See if they are mentioned in local and international news publications
Be careful in using your new exchange, application, and browser extensions