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You can deposit all kinds of cryptos into your Bitshares Wallet (BTC, LTC, EOS etc...) but I think the lending option is only available for BTS and BitUSD holdings.
That said, I would recommend to put some of your earnings from Steemit (SBD/Steem) into your BTS Wallet since every gain from Steemit are always taxable events. And when you transfer your Steem to Bitshares you can buy BTS and use the 20% lending option. That's how you can make the most profit out of it!!!

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