I am using my mobile phone with my 4g internet connection. Doing signature campaigns on alts does not really need computers but a mobile phone will do. The only problem is only the speed since mobile phones have small keypad compared to computers. But anyway as far as my experience goes it is still my minimum requirement and with it I have already earned a thousand dollars.
I am using my mobile phone sometimes laptop and a Wifi internet connection. Then I'll find my comfotable place at home and will start to work here in Bitcoin and cryptocurrencies. Earning here is not that hard as long as you have what I said.