Credit cards will be no good anyway for Russians hoping to go on a spending splurge; Cartier, Hermes, LVMH and other luxury-goods companies have stopped selling their products there.
Now when I go shopping, I think about what types of clothes I'll get the most utility out of-- for instance, a wedding-guest dress or a business suit-- and splurge on those, because I want them to last.
Conversely, a prudent investor becomes a bad investor, at least in the short run, since he will not invest at the inflated prices that result from the profligate spending of the beneficiaries of negative interest rates.
They either thought he was a drug dealer or he's recently sold his and his ex-partner's house or something and he's trying to live at large before he has to stop.