That's the best approach you can do when it comes to trading, split your orders in smaller sizes and trade over a longer period of time. Nobody knows exactly when we will reach the bottom, it's predictions and only time will tell if we were right or wrong. Similar to your approach I have been buying bitcoins for the last two months now. Buying every 4 weeks seems like a good interval to take advantage of the dip abs get a good average price. Your 2 orders are fine if the price will drop further. But what if the worst is already behind us and prices are recovering? Than you will have missed out on investing 50% if your money.