Bad Investment with $$’s but maybe

I’m considering an investment that basically has gone down the drain but could lift my child up.  For this investments returns have been less then zero in the past and honestly there is no real reason I should believe I will see a $$ sign if I was to invest more capital. So have I lost my mind as I consider one more shot at this craps table which has produced rolls 7’s after the dice has been cast?  Maybe, but maybe not? For this investment might give my child the opportunity of a lifetime that she couldn’t receive anywhere else especially if I tie it up in some legal jingle.  Yes, there are investments which will probably fail in one part of your life but in other areas you’ll be rolling in happiness. G-D willing the dice will turn around on both ends but if not one will be sufficient to produce the results I need to continue this roll.