As long as you invest your spare money, you can buy it anytime. Bitcoin is the perfect speculative product. Sooner or later, it will rise. It's just a matter of time. Since it is idle money, put some in the wallet and remember the private key.
there is nothing to lose to invest funds in bitcoin and anytime you do it will be the same because it is certain that bitcoin will increase higher than when you buy for investment.
because we know that the bitcoin period will always experience renewable ATH and happens every 4 years. I agree that if the funds can be used, it is not for other needs.
Please don't get fool by buying "anytime" because it has an advantage when you bought at a cheaper price compared to buying at a high price. This a thing we need to consider before buying and even it was just spare money for you, you can't just simply put it at risk and lose it. Of course, our goal to earn money, not to lose them and that is why we should take the best opportunity, otherwise.
I think it's true what is said with "anytime" as long as it doesn't finish reaching ATH. but if you buy at a time like now then you can be sure there will be no losses that you will experience. please remember that bitcoin will always increase every 4 years with renewable ATH, so even if the price is high, if it hasn't arrived at ATH, there is no loss.
even though people really want big profits and want buy when the price of bitcoin goes down, they just buy it, and it's also not wrong to with each other's plans as long as the funds it is not for other needs.