Well, rather early on, you can unlock the upgrade that gives you a four leaf clover for each 15 streak, which u can upgrade twice so only 13 streak is needed.
which is still hard to achieve since msot streaks are 10 at most.
but someone with way more time than me and where the game doesnt lose all progress once you close and reopen the browser may actually collect all 9999 to colelct the mana coins, that new sword and that for the ridiculous cost utterly useless +0,1 sec fever duration upgrade.