What can you put 100 million of in your friends backyard

What can you put 100 million in your friend’s backyard is a riddle by Mr beast, who is a famous Youtuber. He asked this question on the Reddit account. The video of his also became popular in which he puts millions of pennies in my friend’s backyard.

Question: “What can you put a $100- milli. in your friend’s backyard guess it?”

Answer: The correct answer is orbeez or pennies.

If you have any other thoughts or any other answer do let me know I will post this on puzzlepaheliyan.com.