Over time, your SCOBY will grow. You can split it up and share with fellow brewers, but even then you'll end up with too much. Chop it up and dehydrate it with sugar to make a chewy candy.
Everyone knows the idiom, you are what you eat. If this is true, do we know who we are? Increasingly people are trying their hand at the old foodways. We are preserving: Food, culture, community, ourselves.