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Then crypto is not all is thought to be. At least regular people have access to energy because it's all around us, so they can mine even if they need a little help with the know-how by harvesting energy, but how do you prevent banks from simply freezing people who want to purchase with fiat?

How can we keep them from taking our own money (or print more out of nowhere) to purchase PoS and then sell it to us, buying a whole bunch and get people excited and then dump it all in 5 minutes?

Too dangerous, I thought mining was Satoshi's breakthrough.