You will have this before the end of the first run because you need a minimum of 1200 coins to beat the game. 200 for buying crafting patterns and 1000 spent on the final quest of the game.
Green coin - 1
Blue coin - 5
Purple coin - 20
On the last chapter there is so many coins that it is probably faster to use the pogo stick + propeller hat and grab all the coins above buildings. Let yourself die, go in the tea house, leave and the coins respawn. Repeat until you have the 1000 to finish the game. I had 500 saved up by the last chapter and it took about 10 mins to get the 500 needed to end the game.