"The best day to have started investing was yesterday"

This however, wasn't true over the past 6 months or so. In fact, it probably will not be true for the foreseeable future too, considering the big tech industry has been sliding and will continue to slide with poor guidance and rising rates. 

However, having said all these, I do believe that one with capital should take a small position in big tech, considering the large investment moats each of these companies have. As price continues to go down, one can consider to continue adding these stocks to your portfolio. With time, assuming inflation finally goes down, this accumulation phase may finally pay off.