The main resources in the game Clash Royale are:
The gold in Clash Royale can be obtained in many ways. You can obtain gold by opening the chests you have won in the game. Other way to obtain gold is to win a 1v1 battle, 2v2 ballet or any challenge that is available in the game. Gold is also obtained by donating cards and you can always use your gems to buy gold from the shop.
Gems is one of the most significant resources in Clash Royale. You win gems only by opening the crown chest and the clan chest, and there is no other way to obtain them, directly from the game. You can always generate them for free with our Clash Royale hack tool.
The Elixir is a significant resource during the gameplay, you need it to drop cards faster. There is no way to gain more elixir, except if you play the Elixir collector. That is why, you should always balance your deck with cards that are not so expensive in elixir, so that they can rotate faster. You should always keep this strategy in mind.