I decided to start doing some trading and got an account on bittrex for that (that's what most of people advised me to do. I saw that there are many currencies there. I don't even know some of them at all. Anyway, I transferred some funds to this site and wanted to make my first purchase - IOTA. To my deep disappointment, I found out there is no such currency there. My question is WHY? Iota is in top 5 right now in marketcap and #10 in volume! Why is it not possible to trade it on bittrex? I really don't think it's worse than Expanse or Mysterium (both around 29 mil marketcap).
Bittrex have a habit of delisting coins when their trading volume on Bittrex drops. Because this causes loads of aggro, they are now pretty cautious about which coins they add (this wasn't always the case). They'll want to see sustained trading volume elsewhere before they add it, to save themselves the bother of adding it, the coin doing well for a few weeks, and then the volume dying and them having to delist.