Are tech stocks a buy now?

Tech stocks seem to have lost some momentum. I still feel the Big 7 tech stocks are overvalued right now. However, stocks tend to go up in the long term. Is it a good idea to buy tech stocks ( $Alphabet-A(GOOGL.US)$ Alphabet, $Microsoft(MSFT.US)$ , $Apple(AAPL.US)$ , $Amazon(AMZN.US)$ , $NVIDIA(NVDA.US)$ , $Meta Platforms(META.US)$ ) right now considering I am in for the long run (10-15 years)? Should I just wait for the prices to reduce further? I am afraid a bull market starts from here and I end up losing the opportunity of buying them at a good price.