In the same timeframe, most wages not significantly changed, a big cup of fast noodles went from 20 to 100 roubles, bread 10-15 to 50+, simple 0,5L of bottled water gone 50 from 15. Hoping it would bounce back from 100 to 90-something is kinda ridiculous, especially as these drops were all self-inflicted and it was easy not to cause them in the first place. I don’t understand how you as a brief visitor could observe these dramatic changes in time, but locals around me can’t or don’t have a problem with it.