I am always in doubt with these questions. (May be a noob question...).

1. Can I store Eth and many other coins also along with BTC in BlockChain.info?
   Willn't it support 'ERC 20 Tockens' also?

2. Similarly, can I store BTC and many other coins along with Eth in Myetherwallet.com?

If I can do that, I think, there is no need of registering for more than ONE wallet.
Isn't it?