I've been using Coinimi for over a year, so far just to collect my Pinkcoin stakes, keeping all the coins in my staking wallet in 1000 coin chunks instead of adding the stakes to the chunks every time. A little bit of OCD, perhaps, but I heard it helps to keep the chunks @ 1000 each.

I love that I can send almost any coin I've owned to it if I choose to, and trust that I have control of my funds no matter what, not to mention still get most/all of any applicable airdrops as of recently. Another one I like is BitPie, which also offers a pretty wide selection of cryptocurrencies and provides the same security of your funds as far as I'm aware. Perhaps not if you use the trading aspect of it though... there was one day recently where the service was down for a bit, and as far as I knew, the only way I'd see my funds again was when the service was re-enabled.

We'll be sure to write some articles on the decentralization capabilities and possibilities with crypto :)