I sent some ETH to the ICO address, the masspresale tokens show up in the ether wallet - that's good
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It was mentioned that once the ICO ends, the masspresale tokens will change to MASS and become available for trade.
This means that they will be on an exchange, and for them to be staked they have to be in a wallet.
There will be a MASS wallet or how that work if I want to buy more MASS and send from exchange to a wallet where they can be used?
That is correct, but there doesn't need to be a special MASS wallet, it just needs to be any Ethereum wallet that is erc20 compliant, such as myetherwallet, parity, mist, etcetc.
I suppose the rest of the project is still in development and question suchs as "How much of my MASS is staked in which currency?"
and "Where can I see the returns made on staking and send that back to ETH wallet?" are for the time after ICO closes to a finish.
Kind of, but 100% of it will be staked proportionately in the crypto currencies that MASS holds, although at the start it will be a bit slow as those cryptocurrencies are bought. As far as the returns you will be able to just view that right on the blockchain (although we will have a dashboard as well)
I guess the main question is: I got some masspresale tokens, what do I do now? Sit and wait until the ICO ends (well du'h) and have you guys finish up on the project so people have control of their MASS and further actions with it?
Yup, just sit and wait, once the ICO starts you will receive your proper MASS tokens, then when the ICO ends, you will be able to do whatever you want with them, stake them, hold them, or trade them.
Hopefully this answers your questions