Coins are plentiful. Mega speedups are not-grab the speedup.
I certainly have more coins than speedups--but I'm still somewhat limited. I've got a warchest of 22k coins--the most I've ever had (thanks to this thread and learning to coin farm), but farming still takes time that I don't always have. I really want mewtwo, but I figure I'll need to have about 20k coins to make sure I get it (all items plus 2 greatballs).
That having been said, you do have a point. I may just wait to see how far down I get pushed to see how likely I am to get in the speedup range near the end of the competition.