Many Youtubers and experts are saying that a market Crash is about to come. They said "We are in a bubble that is itself in a bubble" and this crash will be larger than 2008. What are your views on this.

Americans are more inclined to anticipate a crash which can be seen from warren buffet's position nd this gentleman author -

https://www.livemint.com/companies/news/warren-buffetts-berkshire-hathaway-offloads-billions-in-stocks-for-12th-straight-quarter-what-does-it-signal-11762074054211.html

https://www.livemint.com/market/millions-will-be-wiped-out-rich-dad-poor-dad-author-robert-kiyosaki-warns-of-market-crash-shares-safe-bets-11762068095675.html

Now rich dad poor dad author keeps predicting a crash every alternate month but should we take him seriously this time?

Valuations of apple, nvidia, microsoft and tesla are already stretched.

But the valuations of Indian companies are just crazy. Let's forget about zomato or lenskart for minute, just look at nifty 50 companies. Trent at above 100, fmcg company hul at 54, infra companies like tata steel is at 47! I have been in the market for the last 12 years but I have never ever seen such valuations.

1. what's the reason for such high valuations? Mutual fund money? Or is it not high valuation at all?

2. Has p/e ratio become an obsolete marker in Indian stock market?

3. Do you think a crash is imminent despite flat returns past 1 year? Why? And if it does happen in American market, is India shielded from such crash?