Not too late like I believe, one thing I believe if Dcaing is that every entry price remains profitable as long we are capable to hold for long. The market will surely often experience some corrections creating opportunity for anyone who missed the opportunity of accumulating enough Bitcoin in his/her portfolio even those who had bought may even want to buy more but in a much softer practice.
If you consider it rational to hold a position for several years, then there is no reason to worry about the current price level. Obviously, many traders breathed a sigh of relief when, 2 years after buying Bitcoin at the maximum price, the current price reached the purchase level again.