If we allow risk or greed to take over our mindset, then we will not be able to invest and accumulate Bitcoin at the same time with fear.
Although, I agree that our profits all depend on the amount and how frequently we click the buy button, in years to come, 1 Satoshi will be worth a hundred boxes or more, so if we can start from now to buy and hodl then we will not regret our actions because we have invested earlier, accumulated with DCA strategy without any fear or greed.
If Bitcoin's price increases, we investors will be very happy about that, but at the same time, there are others that will still want it to drop so that they can buy. Those that are praying for Bitcoin to reduce are the guys that have not yet invested, so they just sit down and wait for Bitcoin to be reduced, so that they can buy.
However, I come to think that those that want the price of Bitcoin to be reduced are the ones that are so scared and greedy. At the same time, they don't want to buy at a high price, so they are waiting for the price to reduce. (I am trying to say, people should not mix fear and greed when investing).
We are not sure what will be value of 1 Bitcoin in coming 5 or 10 years. 1 Bitcoin was almost zero 13 years back but in a decade span it went high to 67k and today its somewhere around 37k. The real benefit of investing Bitcoin is not only how much you buy but also for how long you can HODL. There are many like me how cant invest 100$ per week in Bitcoin because its too much for them but that doesn't mean they should stop investing in Bitcoin. Invest as much as you can in Bitcoin easily.
One thing we must keep in mind as investor is that Bitcoin like other investment has its own risks. There will be times when price goes up and there will be times when price will go low. So as an investor we need to be prepared for both situations. Don't just start selling if you see price going down and not even if you see few bucks coming from selling.