Still worth to buy a Mining Rig?

Just look at the price of bitcoins a year ago to what they are worth today and then ask yourself that question...

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mine with something cheaper and make just as much mining the right coin.

I have mine "off" since at least 8 months... only mining some shitcoins on lauch.

Nowdays I don't not recommend, since the power comsunption and price are very high

I don't that it is. The whole cryptocurrency scene has kinda died out. If you haven't already invested now is not the right time.