In my own perspective, I think that the ideal time you feels like you have accumulated enough Bitcoin is up too you as an individual, though as humans we always want more, but in life we will definitely get to that level where within us, we can admit that if we stop now, we can as well be ok with what we have, so till we get to that point, I don't see any reason to stop accumulating Bitcoin when it's still very cheap as now.
Lastly, we all know that the stash of Bitcoin in your possession determine how wealthy and profitable you might become in the future, so till you get to that point of satisfaction, you wouldn't even see any reason to stop accumulating Bitcoin, because you aren't satisfy with your current stash of Bitcoin in your possession.
Perhaps every thing you have is quite right. The satisfaction of humans is infinite to an extent and as such people (those of us who are into bitcoin) would want to keep buying even after we realise that we have accumulated enough bitcoin and the word
enough is peculiar to every individual (investors) as my emd point would probably be the very beginning of accumulation of others.
However, it's obvious that we (newbies in bitcoin investment) shouldn't at this point be in any contemplation of stopping as we haven't reached any significant amount in our possessions. Satisfaction in our bitcoin investment is quite a long journey which I believe none of us here is in such position to claim we have enough bitcoin even though it's obvious that I do not know how much you ( including others ) investment regularly (daily, weekly and/or monthly) into bitcoin yet its a fact that none of us here is able to hodl a good amount of bitcoin.