Adding QQQM while already investing in VTI?

Looking for some advice. My portfolio at this point is basically 50% VTI and 50% MSFT. I really want to keep a strong position in MSFT. so instead I was considering purchasing QQQM instead of MSFT to reduce my risk while continuing to increase my VTI holdings. Does it make sense to do a 70/30 split(VTI/QQQM) or are these ETFs redundant?