What if bitcoin stops? What will gonna happen to the members of this group? What will happen to their investments? Is this forever? How to support this group in order not to stop...?
Bitcoin will not stop. And cryptocurrencies don't just involve in bitcoin and it's a huge world where altcoins also exist. If ever bitcoin stop existing, this group are active in supporting other altcoins so it's not a problem.
Yes, but i really don't think that bitcoin can stop because its decentralised and no one can control it, even many country ban bitcoin still continue even though sometimes it really affect it's price but it's normal.