In fact, Russian Central Bank is pushing that only qualified high net worth investors will be allowed to hold "derivatives on cryptocurrencies". So it is way way far from liberalizing own citizens. But they like the tax idea. 

But equally true, Russian citizens love to bypass the laws.

SwapMarket

Undisciplined

BooksAndArticles

International Money for Enemies

denlillaapan

seems like the most obvious play around. 

(Though, for most of them, it's a double-edged sword: freeing yourself from the financial oppression of outsiders _also_ frees your own citizen from _your_ oppression.)