What do you mean by user acceptance testing? Is this the last phase?
Firstly, the devs test the platform to find bugs, than there is a launch and users start testing it
will you achieve the hardcap during the IEO?
That is possible, let's see

Why don't you develop your Youtube channel?
We have Youtube channel:
https://www.youtube.com/channel/UCR8pvjwOtKkgKRt2BwQx6aQWill you keep a history of all transactions or only for a certain period of time?
All the transactions are kept in blockchain. If a person wants to take part. in the mirror trading, he needs to show his transactions