Uniquely, any cryptocurrency, in addition to bitcoin and ethereum, can and should be bought on the stock exchange. At crypto exchange exchanges, you can buy any altcoins, except those, of course, which are still at the ICO stage.
Unfortunately, the majority of good exchanges with a rich choice of alts does not support the completion of the internal balance in the Fiat, so it is unlikely to buy any cryptocurrency for rubles or dollars directly from you.