My concern is why are you just wondering there is only Web wallet where you can receive and send Bitcoin. This is a terrible decision using Web wallet to store your cryptocurrency. If you aren't forced to use a Web wallet for any reason then there is no reason to choose a Web wallet where you can use Electrum on mobile devices and PC as well. Otherwise, you could buy a hardware wallet for best practice. I am just wondering why do you want involved with blockchain Web wallet? How you are soo confident that blockchain Wallet is secure and trusted? You don't need to trust anyone once using the non-custodial wallet.