It really depends on how you are using it. Through blocktrades you give the memo key that they provide you, so others can't track your account back to steemit to know who you are. If you are using your memo key directly, you are making them the path.
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so we can transfer without the memo key? from bittrex to steemit?
Yes, We can through blocktrades.
good information but i think the way i did is also safe since every one can see our public memo in steemd right?
It really depends on how you are using it. Through blocktrades you give the memo key that they provide you, so others can't track your account back to steemit to know who you are. If you are using your memo key directly, you are making them the path.
We don't have millions here in Steemit, so I assume we are safer than fat wallets. 😆
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btw thanks for reminder. it will help alot for me and for those who will read the comments.