The mining business must be taken as an investment. By the same way as investing in other asset classes.
Good compare is the traditional stock returns which are yielding (in long term) something about 9% p.a. In mining you can reach that number easily an much more.
But do not except to receive 100% in a month. With a bit luck and for a short period of time it has been possible but annually the numbers are much much lower. This year has been a bit over 100% p.a. (not month). I expect will end the year quite close to this number (a bit lower).
GPU/ASIC gap stays the same or widen a bit.
Well said. Also not all SHA256 coins are going to make successful investments. X11, X13 so forth & so on also have coins & tokens which a good for holding & some will disappear. Research on coins & tokens is no different from any other investment. Many cannot be mined, but still make good investments.