I would step ladder my buys now. We're close to the bottom, but I think we have one more massive dump before the whales come in and scoop up all the cheap bitcoins then push it back up. So I would recommend buy a little now 20% - 25%, then when it dips another 20% - 25% so on and so forth. You may not get the absolute bottom, but you won't miss the ride up and cost average your way down.