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Weku currency isn't more than steem currency in value and that's simply because weku currency doesn't have a value yet.

Right now it's value is still speculative and it isn't being traded on any exchange yet. Weku itself was based off of the steem blockchain so I expect that when it actually does start being traded, it's value will probably settle at a price that's similar to STEEM.

Weku currency is not on the market yet. When Weku currency in the market, marketcap of the currency will show how much it has value. 

Weku dolars does not mean it is equal to 1 USD. Their total number of coins and people attention to Weku platform will affect the price. 

According to their explanation token sale is in 3 to 6 month. After token sale price will be decided by market.

The weku currency has no value at the current time. It isn't on the market so no one has a clear indication of what that value will be. Steem was very low when it started so expect the weku dollar to be worth cents to begin with.