What is the minimum to invest in ICO?
It says in the whitepaper that "the minimum participation threshold in the main placement will be 5 ROCK tokens."
But I'm not sure if this is about ICO investment or it is about long term cloud mining contracts, so after you purchase ROCK tokens, you will be able to invest them into mining contract, this will be possible in December I think.
You should wait for an official answer. I think 5 USD is enough, so 0.0169 ETH at the moment will give you 5 ROCK tokens. But I am not sure as I said.
Hmm.. The minimum investment is a quite affordable. If we are interested to invest, should buy now because after the 29th of October the price will rise $ 1.2 per tokens.