Exactly by thowing it away, into investments that are more difficult for the Russians to ever touch, if Putin should choose to do so. Bit like the arabs buying Newcastle and Man City, future incvestments once the oil dries up.
Afterall why would anyone want to buy Chelsea and spend absolute millions on it's players back in the time, it's because he wanted to hoover up the legitimate money, via investing his dodgy money.
However, if a Labour government get in, I'm damn sure they will start looking closer at those investments and freezing anything that dosen't account for where the money legitimately come from. This will then piss off Abramovich and he will look to start binning off his investments in the UK.