Investment Q&A

Q: Hi. I totally missed the boat on Palantir. When the stock was in the high 20s, my beliefs and lots of what I read was confirming that the stock was over priced (at least that is what I thought), and I felt same as the stock rose to the 30s, 40s, .... and now over a hundred. And I still feel that the stock will need to correct at some time, as it has a trailing P/E in excess of 500 and possibly a P/E of at least 300+ looking forward. I made exactly the same mistake with many other companies such as Netflix, Facebook, .... I know that small, newer companies can exponentially increase their profits as they grow up but there is no guarantee that they will be successful (let alone be excessively successful).
So my question is three fold (please deduct necessary credits).
1. What did I do wrong here? I watched the stock go up and up and never pulled the trigger, thinking it was always too expensive. I sometimes feel it is more of a meme stock.
2. Would you buy Palantir at these prices / why?
3. Do you feel that there may be some other companies out there that may be in their early days (or well established) with lots of room to grow. If yes, your listing a few of your top convictions, along with a sentence (or two) explaining your rationale and intuition would be greatly appreciated.
Thank You.

Q: Jumping on the AI bandwagon. What do you think of these 2? Soundhound & Big Bear?

Thanks!