I doubt that it is enough to merely have a price and time target since bitcoin as compared with fiat is a moving target and it would likely play out too simply to just have narrow targets, especially if anyone is attempting to actually understand bitcoin as more than just a trade. .but yeah, sure people can do whatever they like in terms of their figuring out what their goals might be within the process of accumulating.. and then figuring out what comes next .. is it just getting in and out of the bitcoin or is there some attempts at maintenance involved.
Bitcoin indeed has quite a volatile and dynamic nature and this nature of bitcoin makes it very difficult and challenging to set simple price and time targets. Bitcoin's value fluctuates rapidly all the time and since Bitcoin is still relatively a new technology, its adoption and use case has the potential to evolve with time. So to truly understand Bitcoin, one needs to consider its underlying technology, it's use cases as well as market trends.
Bitcoin accumulation may indeed be quite a complex process and it's pretty much normal for people to have different goals and expectations when investing. Some might focus more on HODLing for the long term, some might decide to delve into the short term, and others might decide to use it solely as a store of value or even for cross border transactions, and this is why it's important to identify your own goals before delving in, as this could potentially help you choose a strategy that aligns pretty well with that goal.