It would still be useless if we will keep dwelling on the past and think of those "if's" and "but's" because it will not really help anyway. Much better if we will start moving on and do the things that we think are more profitable these days. And since there is a current price correction happening, i think this will be a good time to start buying bitcoin and potential altcoins and see our investments keep growing in time. Although there might be lot of mistakes in the past and past opportunities that have been missed, instead of regretting from them, maybe we can learn from them and be more motivated to do what is supposed to do because its the right thing to do to to earn huge profits in the future.
That is the key to make a profit, while some people see the price going down and their investments melting away and get fear, others see it as a chance to buy more and profit in the future. I am one of those people, not that I have any money right now, I am as all-in as I can be and that is why I can't buy even if I want to right now. However I have done this before, the price went low and very low and I just ended up buying more instead of fearing of what could happen.
Yes, I know that the price could fall a lot more right now and that is going to be horrible for people hodling and buying but that doesn't mean that it won't recover. You may not end up buying at the absolute bottom but that doesn't mean that you will not be profiting from it neither. It could go down more after you buy it, but you could potentially still profit from it for sure.