I really don't see how .io is better than .bio.
I have a few perfect .bio's which don't sell, or sells but doesn't get paid.
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In each case, a group of people get best names in an extension, and make it popular artificially, and fake-sells some poor ones, and do deals with big players and at the end really make it popular, at least temporarily.
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Why do I say this, because I'm jealous? No, I'm not against speculation. We are not talking about fairness here. .biz was made very unpopular, and some domains which would sell for millions if were .com, were dropping, and could be grabbed just for $2. Now it doesn't happen, because neulevel is reserving them for themselves and not allow them to drop. So will they make .biz popuar: I think they will give it a try.