thanks for all you guys' input on this. it's really amazing!!! and your input is really helpful to me. especially i'm such a newbie on cryptocurrency.
just few more questions raised to my mind -
1) seems some ppl use poloniex, some others use bittrex. is there really any difference using either of them? or it's just a personal taste
I would recommend Bittrex given the issues that Poloniex has had over the last couple of months.
2) if i purchase the license from a reseller (0.09B), i can still get all the official support from gunthy, am i right?
That is correct.
3) which VPS provider you guys used?
Any will do, e.g. Ubuntu 16.04 on Vultr.