Hold? It means as long as I hold a certain amount of XBASE I still on one of the memberships ( Plus, Premium, or Professional Membership), automatically? or I need to apply? And the amount that a hold will show in which memberships type we are?
How if someday I lose/uses my XBASE?
Yes, automatically. And if you sell or withdraw the XBASE token, you'll lose your membership. Please see this picture for reference:
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I thought that just one of requirement and we still need to pay with some other currency, such as bitcoin or else. Okay, it is fair enough.