Look at this and you'll find out what's IOTA about
https://steemit.com/cryptocurrency/@interpreter/iota-cryptocurrency-with-no-transaction-fee
Investing or not it's a personal decision but If I may give you an advice try to get to know everything about the project (some projects ended up being scams) and if you think that it would be a good acceptance from people and the project would be usefull in the future just then you may think on investing. Taking that decision it's not just about holding the coins and waiting for it to magically earn some profit.
The fact that a coin goes up or down depends on people's interest. So if you are exited about IOTA as I'm look at the link, learn about the project and then decide if you want to invest :)
I bought 90 IOTA Tokens today and plan to buy more in the near future.
I hope this helps
Hy thanks a lot for your useful comment. I see its only available on bitfinex which I guess was hacked last year :p
There are other coins to invest
So far what I have learnt about Golem, I liked their project and I look forward to invest in it !