I still have an eye on IOTA since months, but I am too much into Byteball. It definitely makes more since to hold all my btc (or even buy more) and get free byteballs, than sell a little bit and buy IOTA instead.

But I think, when the Byteball giveaway ends, there can be a little switch over to IOTA. And that will be the point where I maybe start to invest a little bit.