Currently the value of Bitcoin is 67k, it can be said that Bitcoin still has a high value. We all know and believe that Bitcoin will rise above 100k. As such, even if someone buys Bitcoin now at 70k price, it will not be a loss, he can still make a profit by buying Bitcoin now. Because the price of Bitcoin will increase. There is always someone buying bitcoins, it is impossible to stop buying bitcoins. Any time you buy bitcoins, only long-term holdings will benefit you.
Bitcoin's prices is 65k$ which is still higher price so investment in Bitcoin now is not a foolish idea but if someone invest at 65k$ and then sell bitcoin due to emergency purposes or panic then such people will be termed as fool. Buying and selling both prices effects your profit so if you buy at higher price then at least plan a target at which it can give you profit.
I think buying before 75k$ is not a bad idea because prediction says that bitcoin price will soon rise to 100k$ so if someone buy at 75k$ then still he will be in profit so I think that investment in Bitcoin at any cost is not a foolish idea but if we are waiting more and more that price will reduces and then we will make investment then this is not an appreciated job.