Taxation of capital gains by USA from cryptocurrency of Russian student on an F-1 visa

I am from Russia and I currently study in the US on F-1 visa. Last year I did some cryptocurrency trading which is taxed as capital gains in the US. US-Russia tax treaty says that:

Capital gains on assets other than real property would be taxable only in the country of residence of the person deriving the gain. (Such gains are dealt with in the residual article on “other income” which provides for exclusive taxation at residence of income not effectively connected with a place of business in the other country.) Gains with respect to real property may be taxed where the property is located.

Does this mean that my capital gains from cryptocurrency trading are not taxable in the US, or am I missing something?