Bitcoin prices have consistently risen over last 10 years. Does not matter when you bought bitcoin but if you held for long duration in last 10 years, you would never been in any kind of loss. This means that those who have faith in bitcoin can freely invest even in ATH. Because even though a correction occurs on this ATH price, they can still hold for some time till the prices start increasing again. I suggest most of the new investors to keep accumulating bitcoin as per their savings. But one should not invest more than what one can afford to loose as bitcoin is still very much volatile.