Basically, before investing in Bitcoin, you need to plan for a long-term investment. If you buy from deep and wait to hold it for a long time, then many times it is seen that the market has gone up and then you will not be able to buy from deep.
When you miss buying Bitcoin at a low price, you can actually still buy it in the future. That is, if you are lucky enough.
Like when you missed Bitcoin at $70k a few years ago. You felt late to buy when you saw the price reach over $100k. But if you actually made a good buying plan, you could buy Bitcoin at $70k or even lower when a drop occurs, like it is happening now.
There is always an opportunity, but it depends on your ability to wait.