this contradicts both the expansion of
richlist and increase of the funds in its addresses

I know a guy who have 2500+ mxn, he was mining from beginning. He is still parking his coins but he is on verge to kill himself! We can't expect great performances of mnx on next bull run cos its "stable" coin!
am guessing you are "that guy"....
ps: don't off yourself please. You will be missing the face melting pumps of the next bull market....whenever that happens....
