Way to go, Roths are my favorite. :-) There is one crypto right now that is sort of a "Crypto mutual fund". It tracks the top 20 coins and purchases a proportional amount. It would be an easy way to get a wide variety at once, because as far as I know no single exchange trades all 20 top coins. You can buy it in the bitshares exchange. Here is a link if you are interested. http://www.bittwenty.com/