Second wallet needed to mine BTC? I am being invited to invest small amount of BTC. I am being asked to create second wallet. Is this legitimate?  I am trying to understand the mining process,  I did not think one needed to use bitcoin to mine more bitcoin. 

I am trying to understand how this works, excuse my slow learning.

Thank you,
Andrea
You don't need a second wallet to mine. You absolutely do not need bitcoin to mine bitcoin. You need an ASIC miner (with power supply), electricity and an internet connection. 

They are scammers trying to steal from you.

If you want to mine then buy an ASIC miner. But be careful, there are also scammers pretending to sell miners.