In fact a volatility of the ruble is mostly speculative right now.
Oil was lower in 2008 but it hasn’t effected exchange rate as much.
There are added negative factors this time but these aren’t so overwhelming.
Hahaha, the old “speculators are destroying the value of our money” routine. Every dictator tries that one. It’s a lot of hooey. The ruble is tanking because it was psychologically inflated on the expectation of growth, which isn’t going to happen, so there’s a flight to safer currencies and forms of cash.