for saving money ..firstly you sholud to not spend money extra ....money spend only where necessary...or need .. then you can save money....
which is better invest at bitcoin or saving in fiat? or buyng new gpu for mining altcoin

now im confused, i spend arround $1500 to build ethereum mining, i can earn arround 0.8-1 eth perday, now i prepare to buy new power supply, but i confused must i sell my bitcoin to buying nw vga ?