I read this and to summarize what I understood about POS:
- each hemp coin = a draw in the lottery;
- coins in a closed wallet/paper wallet do not generate POS and can not win the lottery.
- win the lottery = give some sort of authority to the validity of the block chain through POS.
attacks/forks can happen when more than 51% of "active" coins are owned by one person.
It looks like it is in the hemp coins (and all other POS coins) best interest not to leave large amounts of the coin stored in one location and for users to leave their wallet open with all of their coins in the wallet.
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The dev is working on a "checkpointed wallet". I can't find much info about what this is online. Not many coins have a checkpointed wallet. This will make the hemp coin one of the most secure cryptocoins once the new checkpointed wallet is implemented.