Electrum Bitcoin, is a wallet to store only Bitcoin, it is a secure wallet since it uses a network of specialized servers. It is a simple and small wallet available for both computer and smart phones, the support of each version can be easily hidden on its website.Currently it can be considered one of the most important wallets to store Bitcoin, this wallet is open source also to offer 2-factor authentication to prevent malware attacks.
Electrum Wallet divides the permission so that users can spend their bitcoins on different wallets, this wallet allows for Hardware wallets like Treor, Ldger and Keepkey.
in summary it can be said that Electrum Bitcoin Wallet is one of the most complete wallets at present to store Bitcoin, it presents a good quality security, available for mobiles and computers. Obviously, focusing only on storing Bitcoins has its limitations, but since there are many wallets that offer this service for BTC users, it is the best option