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It really depends on the kind of hardware you are running. For instance, I have a single RX 480 and a Ryzen 5 1600x CPU, and over the last month and a half, i've been able to mine around 30 of them. They are worth almost $8.00 right now. However, the difficulty is rising, so it's getting harder, but I feel that it is absolutely still worth it (depending on hardware, of course)