Many of us prefer to hold multiple kind of coins. What do you prefer: holding it in a sigle kind of wallet or have it on a different kind of wallet?
Personally, I prefer to store in an opensource multi wallet that support all my preferred coin and even ERC20 token, its the only opensource multiwallet available called Hodler and so far I find it good. Do you think, this is really good idea?

Holding multiple altcoins is really not a bad idea because the aim of holding is to wait and get value for your tokens. Personally I prefer to hold than to sell cheap after working months for a bounty and just selling them cheap on the market. The problem is with holding them all in one single wallet, anything can happen to your wallet at anytime and we have to be careful with the use of one wallet but holding multiple altcoins is not a bad idea.