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I think nowadays altcoin mining become faded. Since mining is not a good solution for scaling up the altcoin. The altcoin is going to change from POW to POs. And there are more and more ICO with fixed amount of tokens. So the future of mining is not so optimistic...

Is it still profitable? The difficulty increasing too fast, no?

Why pay in crypto? crypto is going up, dollar is going down. you want to keep things rising in value, not going down.