Never paint your last miniature, it could be fatal. Once upon a time, I had a huge lead mountain that was becoming a millstone around my neck and cluttering up the house. I made a conscious effort to reduce the pile and only buy what I intended to paint. But increased lockdown productivity and a lack of trade shows have reduced my lead pile to dangerous levels. It's time I bought more miniatures, on purely health grounds of course.
Judging from many conversations I have had over the years, I suspect that most of us have a lead mountain that is far from at risk of elimination. But just in case, keep some miniatures aside as life insurance.