BTS trading/security/wallet

[svk]

I traded BTC for BTS on Bter.  Should I or could I transfer the BTS into the BitShares Wallet for security purposes.  Some confusion here regarding the wallet and security.  Why would one hold BTS in a wallet while missing out on the advantages of holding on an exchange like Bter?
Thanks

I'd inverse the question, why would you hold it in an exchange that could pull a Gox or go bankrupt or be shut down by governments at any moment rather than keep them yourself? Why would you keep them on an exchange and miss out on the advantages of holding BTS yourself (voting, trading with less fees)?

[Catchfire]

I traded BTC for BTS on Bter.  Should I or could I transfer the BTS into the BitShares Wallet for security purposes.  Some confusion here regarding the wallet and security.  Why would one hold BTS in a wallet while missing out on the advantages of holding on an exchange like Bter?
Thanks