Statements like your are what discourages people from buying bitcoin. If the price is high, according to you, we shouldn't invest because that is "insane" price? Then how would you expect the price to increase further? How do you expect people to enter the market when the price is high?
People's investment isn't the key to a new ATH, if you want to grow your own BTC, better do trading than forcing other people to adopt the usage of BTC for a new ATH. No one can predict when a new ATH will happen, well there's a lot of factors to consider but it's just minimal and prices are still unpredictable.
it is nearly impossible to reach another ATH because the actual value of BTC is not increasing, it is just an effect made by its holders, but now there are many coins and better alternatives, the only 3 features of btc, it was the first, it has the high market cap and how many people, and platforms accepting it. otherwise, any other coin will have a certain purpose, unlike the general BTC.