Multi coins Wallet

Hi, at the moment i have bitcoins and Dashs, and trying to invest some litecoin soon…is there any online wallet to keep all my different kind of coins in a single online wallet?…keep in mind that all online wallets are “trusted third parties” so if the site is ever down so are your coins…same for all exchanges…thats why I keep a copy of qt on a flash-drive and run it mobile by creating a batch file that says: start litecoin-qt.exe -datadir=data then start qt with that…and now you have a true mobile usb wallet

although it is a good idea to use online wallets only if you do not have the resources to store the enitre blockchain so to each his own…hope this helps