We hope they will open wallet soon. There are other exchanges working now: https://coinmarketcap.com/currencies/karbo/#markets

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Read about our novel 51% attack protection at https://medium.com/@karbo.org/prevent-transaction-cancellation-in-51-attack-79ba03d191f0

TLDR: Karbo made a novel and unique protection against 51%-attacks which disallows cancelling transactions from blockchain during reorganization. Now Karbo network nodes will refuse to reorganize to an alternative chain until any transaction from the current public chain is missing in the alternative chain. Even more, the alternative chain has to win within 10 blocks.