When you’ve bought cryptocurrency, it’s best kept in a wallet that you own and control. We would advise against storing your currencies on an exchange or leaving them with a broker. Nearly every cryptocurrency developer offers an official wallet. Using a third party wallet is an extra and unnecessary risk, as history shows that some developers cannot be trusted. So make sure to research the wallet you want to use.
A wallet can be an app on your PC or phone, or it can either be a paper of hardware wallet. No matter what the case might be: store your private key safely and secure. This key offers you access to your cryptocurrency on the blockchain. If (for example) your PC crashes and you can’t reach your wallet, you can install it on another location by using your private key.