I'll take a wild assed guess at it, what follows is pure speculation. Many of Softbank's portfolio companies are not doing well (e.g. Uber, WeWork), and they're

I'll take a wild assed guess at it, what follows is pure speculation. Many of Softbank's portfolio companies are not doing well (e.g. Uber, WeWork), and they're starting to get a bit anxious about whether they'll be able to show the returns that investors are looking for. So they've turned to risky strategies which, in the short term, could show a high return on investment to keep their investors happy. Of course, when/if this unwinds, they could be in serious trouble, but that falls into "problems for another day" I'd usually say that no serious investment company could be this shortsighted, but after seeing what Wirecard did, I'm no longer so sure :)