That's a smart way to invest in these. It's not complicated, just buy whenever it has a drop based on the expectation that it will keep going up. Trading and compounding is a bit different. I reckon there's another $200-$300 to go to the downside for BTC.
i like to look at the longer term picture [what will be used most in the coming years] bitcoin seems to be in the front, for being used, and i've heard positive things about ETH an equal $ amount of each of these 2 coins sounds like one way to go [currently, i only own bitcoin] marc
i anticipated more volatility for coins this week rebalancing out of ETH & BTC to XRP & USD #shortterm