Thanks for your help, I want to mining an I need some tips for do it, Like, What ASIC is better,  what is more profitable, mining bitcoin or altcoin? i read about altcoinis are more profitable.. but.. if i buy a very good gear for mining bitcoin can it be more profitable ?

Hello.
Im new in this... and I want to start mining Bitcoin or Altcoin.
What kind of computer shall I buy for mining fast and how much can it cost?
Thanks for your help in advance