Hi Michael
That's an impressive collection! You might currently have the largest in the US. That you have enjoyed your hobby for 47 years is wonderful! You have to have a passion in life!
I'm not sure if you are asking when do you stop acquiring new tops or when do you get rid of the collection.
I imagine you still like collecting but you see practical problems.
To stop augmenting the collection is much easier than letting it go.
If every time you get a new top you have an excrusiating decision of either storing it in a box or sending another top into a box, I guess it's time to stop acquiring.
But if it becomes a burden, either financially, to family relations or even simply spatially, it may be time to get rid of it.
Also, at a certain age one needs to think if one wants to leave the children the chore of selling it (probably with little or no knowledge of value or history) or should one spare them. Lourens Bas' daughter also has the collector bug and probably will keep his intact. On the other hand, Daniel Lassanske's daughter had to work hard to dispose it. Getting rid of a large collection by selling individual pieces is very challenging and takes too long, as Don Olney found out.
In my case, I continue to collect but I try to pace my acquisitions. But lately I'm thinking I need a larger house so I can display my collection, what is a little worrisome if I think about it