Interesting question, aiuna and I suppose there's no one good answer but let me give an analytical perspective:
Hive has 50,000 users and is valued at $200 mil. That works out to a price of around $4,000 per user.
Let's assume POB will be valued along similar lines. If we get to 20,000 users, that would mean a valuation of $80 mil. With 21 million tokens out there, we get to a value of $4 for the POB token.
But of course these are idealistic projections and often even the best laid plans do not come to fruition so no one knows. If you don't want to affect the price too much, you can set a sell order at a price higher than the current market price.
Thanks for the perspective, it certainly added to my vision and learning about this community.