Do you really think, that someone can give you usefull advice?
You must choose it by yourself. Everone have some favourite altcoins, but thats doesnt mean, that they are profitable to invest.
Yeah! Sure, people can give some nice advice here but I would not really just count on that but try to do my findings myself. The fact is, anything that has to do with investments, it does not make any sense taking the shortcut to do it. It is your money and when the time comes when you lose a lot, no one will be there.
Even if given any advice here, I will advise OP or anyone in his shoes to always take their own time to check the project out. He is already holding some good coins though, and adding IOTA to that won't be bad.