I ask myself this question from time to time and then seem to make peace with the fact the same principles that applied to investing $1M when I was younger apply to investing say $10M+. None the less, good fortune has grown my assets quite a bit in the last couple years alone and I find myself asking the same questions again. Are there any real advantages to bringing in a "professional" once your investible assets cross over X (say 8 figures as an example)? Or, do the same DIY boring AA rebalance strategies continue to work just as effectively as they did before? I'm sort of answering my own question, but just curious if any of you made any strategic decisions to move on from DIY investing at some point and why?