No, I have never invested in technology or internet stocks.
There have been many of your bubbles, big and small, since I have been investing in real estate. Thus nothing changes and it is always the same. These are good things really. By the way here is another great book about investing, in general, which is:
"How to be rich", by J.Paul Getty.
This book is more about investing in general, and no for real estate in particular. Still it is a very excellent and valuable book. I have a paperback copy that was from a used book store and don't remember what it cost. Maybe it was 50 cents. Excellent book.
In my opinion the best way to invest in companies is with groups of stocks, not individual ones which have the poor return stated above. I have personally taken some advantage investing in these due to their tax exempt status as IRA's and and similar deferred programs, but only in small amounts. Regardless, over the last 25 years these have come to be sizeable amounts. I always avoid the brokers for these, look up the individual companies myself and deal with them directly. Also I have gotten a different company each year to diversify. I won't be using them any more though as, being retired now, my primarily interest is to keep expanding with real estate.
Groups of stocks is meaning mutual funds but, again, not just any of them but do your own research and pick the ones with the best current and historical returns and also that are ones that you like. There are thousands of funds, and less than 1% of them that I would consider having for investments, so look at them carefully. Also I have averaged a 20% return from these over the last 25 years so that's not too bad anyway.