While I'm not going all-in on Steem I have recently just bunged about another $1.5K at it, and I must say it's now much more enjoyable seeing my VP actually do something significant. Steem will be my main focus over the coming year.
I diversified a little while ago - Verge has done magnificently for me. Ripple is also something I think might do well next year, so I'm going to hold onto all of that.
I've also had a little play with trading and doubled my money buying in and then out of SC, MAID and NXC, keeping back some of each, having covered by investment by selling half of each.
HOWEVER, I've decided to hold back on investing in more alt coins until I can learn a bit more about the differences between different currencies.
Also, anyone want to buy a cryptokitty?