CPU and GPU Bitcoin mining is dead, you will never mine anything but dust and will never receive a
payout from a pool.
2) Bitcoin difficulty will adjust, meaning so will your income. Difficulty long term trend has been a steady
increase for the last few years. Of course difficulty could drop, it has before, but its rare when it does and
even more rare is a drop that is meaningful.
3) Bitcoin miners in general produce significant heat loads and you will have to deal with it one way or
4) Bitcoin miners can take significant electrical resources to power them. You should know 100% if the
circuits powering your miners are rated for the load you're putting on them. If you don't you should get
5) Bitcoin miners in general are LOUD! As in vacuum cleaner to hair-dryer loud.
Thanks to NotFuzzyWarm for #5