What kind of investment is that? Is it doubler site or anything related to gambling is involved and I don't think with the details you have shared anyone will be willing to invest 2 btc as it sounds bit scammy to me.
It is a magical investment. 5btc is 2 days lol keep dreaming. Why trust a newborn account with such little info. To make 5btc you will need like 5000btc and noone will even give him 5 nevermind more. 5btc is already so many. I don't see the OPs angle here. What a had scam come on OP try harder.
You are logically point out, Seriously why people trust him, even it is not a trust-able account, and also he demand directly 5 bitcoins, it is big amount. Also i know now people are very intelligent, not easily anyone could give him, only in little information. On internet too many scam investment sites are here and everyone know about it that it is risky investment.