if I has little POS token
and I want minting that
at the half way or maybe at 10 days I buy Pos token again
and after 15 days I buy again
that can increase my earn?
and still must hold minimum 3 days every after buy?
Right! But before you add your newly bought postoken be sure to mint first the old one so that will never loose your coinage. If you don't mint it and you dirictly recieve the newly bought token your coin age will reset and back to 0.