This is easily the last achievement you will get. So don’t worry about this too much. But when playing, make sure to set the game mode as Party. This will spawn in coins, gems and emeralds that all count towards this.
Coins are 1
Emeralds are 5
Gems are 10
These are the points awarded to you upon collection.
If you want to see how many you have, select Statistics from the main menu, then scroll right to leaderboards and you will see how many you currently have. After getting all other achievements, I had just over 14,200 points earned. So a small grind left. Good luck, and if you find a good way to enhance boosting for this, add a comment and I’ll add it to the guide.