Which wallets are the best for keeping a wide variety of altcoins?
Are you looking for a good,safe altcoin wallet Here's some of the best wallets trusted and tested by time.ELECTRUM,COINOME ,JAXX,EXUDOS ,KRAKEN,POLIONIEX,BITSTAMP. Remember that many of the names mentioned are primarily in exchange business and has a daily trade. but when it comes for the best , you have to make a wise choice.
don't forget with coin payments for android because you can have more coins option to save your coins. I see that you mention Kraken, Poloniex, and Bitstamp, I don't think that if you have much bitcoin and altcoin, you will save in that site because it is too risky for you if you don't secure your account. it is better to move your coins in the separate wallets like coinomy, Jaxx and coin payments.