Cryonics wants to be small, or why should the future want you?

All this technical discussion misses what I see as the major problem of cryonics if it works as advertised - why should the future want us?

Imagine if today were discovered few frozen Homo habilis and had technology to revive them. After, they would spend their lives in comfortable zoo that is paradise by ape men standards ( plentiful food! no dangerous beasts! warm shelter!)

Now try the same scenario, but with few millions of our frozen ancestors. The results will be same - at best, few dozens would be picked to be resurrected and studied, but I cannot see us welcoming millions of new hairy citizens.

Conclusion - to me it seems that if you want to maximize chance of future society resurrecting you, keep cryonics as close guarded secret of tiny elite...