Bitcoin investment can be made at any time but it depends on the investor how long he can hold the Bitcoin. But the longer the Bitcoin is held, the more profitable it will be, as the market is always moving up and down. Therefore, one should buy bitcoins only when the price of bitcoin is exposed and in control, because the price of bitcoin is waiting for the next bull market.
Currently, after going through the halving period, everyone is waiting to see what will happen with Bitcoin. I agree with you that investing in Bitcoin can be done at any time, but it would be better if the price is corrected so that you can get a cheap price and immediately hold it. And now everyone will wait for the correction to be able to buy and hold until the market increases, so they can get maximum value.
I do not agree with the remark that "Investment in Bitcoin can be done at any time," This is one of the misleading heresies surrounding Bitcoin investment. We should be smart in our investment regardless of whether or not it's that of Bitcoin, investment is investment and assets are assets. They have good, bad and ugly times, so we should rather wake up and face the reality and not let anything blind us about Bitcoin investments.
Those who bought Bitcoin at a high level in the last bull run are still lamenting, though it tried to impress them better now, but for how long? What if the person needed the money in 2022 but trusted in Bitcoin, can such a remark be good in his hearing anymore? I am an investor in Bitcoin as well, but I invest sensibly. I only buy low and sell high when the monthly chart tells me to do it having confirmed a long-term bearishness on that chart. This is smartness and not just being blinded by some general saying about the coin that looks too perfect.
As it is now, Bitcoin would be met with some stiff resistance which is happening already, and on a further look, 2 weeks ago, I declared a sideways movement for the coin, which is also happening currently. However, over time, I think the low of around $56,450 will judge if breached lower, then Bitcoin may sell further. The same thing could be spoken of the high of around $73,850, a breach of it can only declare the continuation of a bullish trend.