Does not concern the 'Yankee dollah,' but the euro-

Putin wants the Ukraine in the Russian orbit; he was pushing a regime under Yankovich that was favorable to strong ties with Russia, but the revolt and moves toward the EU decided him to annex the Crimea, an economically important autonomous parliamentary republic within Ukraine.
58% of the population is ethnic Russian. Industrial plants deal with chemical production, mechanical work and petroleum. Farming is important (60 percent of the industry market).

Russia has important naval installations in Crimea.

All the Ukraine can do is capitulate, allowing Russia to take control of Crimea.
The EU and NATO members may impose some sanctions, but their efforts will be useless to change Putin's thrust.