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Any exchange can shutdown and take your coins in them...? As always store your bitcoin when not trading in a hard wallet.

Thats the beauty of DECENTRALIZED exchanges like bitshares !!! They can't shutdown! You can leave your coins there !!!

Bitshares is confusing. Ease of use is what the people want. Like Bittrex, Coinbase, and WhaleClub!

https://steemit.com/forex/@greenbuff/whaleclub-my-new-favorite-exchange-here-s-why

check out this article

MtGox and btc-e was extremely user friendly also. Everyone is free to decide what is more important.