I'd say buy now and forget about the case of Ripple against the SEC. It will take years before a final decision is reached. But whatever happens to that case, I don't think it has so much effect to Bitcoin. That case has been ongoing for years now, it is not even newsworthy anymore.

But DCA is the way to go. The price is down at the moment but it can still go down much lower, below $25,000. There might be cheaper days ahead.