Don't get fooled...

I'm currently raising my T1 to T2 (max coin level). It's the boost I marked in the image. You might be tempted to press it, but if you haven't leveled up the next coin (T3) after upgrading your coin tier rank, you'll actually end up slower... I've fallen for this so many times. There's just nothing else to do, and my eyes are so bad. I tend to press it without thinking though… (ﾉД`)ｼｸｼｸ Everyone, be careful. If you leave it alone for a while, it'll automatically switch to a different type of boost.