From my limited experience as an observer of the cryptocurrency world, my impression is that mining hardware usually has a certain time period after which it st

From my limited experience as an observer of the cryptocurrency world, my impression is that mining hardware usually has a certain time period after which it starts paying itself off (6-18 months range). You can probably turn it into money relatively quickly assuming that there's enough real money coming into the system, but the cost of the hardware and the fact that all this custom silicon and electrical components present in the ASIC-based mining hardware results in additional cost, especially the environmental kind of cost that has to be taken into account. Those ASIC-s aren't much good for anything else once they've been made obsolete by generational improvements.