Ans, 2: Mining altcoin require low cost? Isn't it the same with bitcoin? I no sabi if the two get difference, if altcoin mining materials dey low, then we move to altcoin but the problem be say, we go fit make profit from mining altcoin?
You are right, to mine bitcoin, graphics cards like Nvedia and AMD that can be connected in grid to make up mining rig for bitcoin mining are no more profitable to mine bitcoin, but still possible to mine some altcoins, I am not sure about the strong altcoins like ethereum, litecoin and others in such high categories. For bitcoin mining, ASIC like Bitmain antminer S19 will be needed or any other good new ASIC like the Antimer T17 which is also efficient.
Mining crypto with graphics card go only profitable if to say the crypto nah new coin wey it mining difficulty no increase.