Startbonus: 400 coins
Collections: 600 coins every 8 hours = Total: 5800
For collectingtimes check this.
We can get additional coins from a quest and Dragon TV.
Monarch #921 (7 pieces)
Burning Sands #1341 ( 8 pieces)
Heatwave #1342 (12 pieces)
White path is for new Dragon Heatwave (LEGEND) and it costs 6670 coins.
White path with green path is for both new dragons and it costs 8435 coins.
The map with the red path is for red chests only. The path costs 3935 coins.