The Brief: The emoji combination "ππ€² " and phrase "diamond hands" are popular on the Wall Street Bets subreddit where they represent someone who is willing to hold onto their investments indefinitely and wait until they become more valuable.

DEEP DIVE
Consisting of the “gemstone” and “palms up together” emoji, the combination ππ€²Β and the term “diamond hands” is a piece of internet lingo that refers to a type of financial investor. These investors are known to be risk-takers who will keep a stock through various swings, waiting for it to get even higher before they sell it.
This emoji combination is popular on the Wall Street Bets subreddit, which has made headlines as the price of GameStop and other stocks surged as individual buyers bought them en masse.
It took me a while to come around to it, but I am now on team ππ€²
— Trump π (@TrumpSC) January 30, 2021
The unofficial Wall Street Bets Shop website defines the ππ€² emoji combination as “Having ‘Diamond Hands’ is when a trader is prepared to hold on to their stocks or securities for a long time. They believe in the future success of their trade so much that they will hold onto them until profit is obtained. This is why they are termed as having ‘Diamond Hands’.”
DIAMOND HANDS VS THE WORLD ππ€ππSEE YALL ON THE MOON πππππππ from wallstreetbets
Even Reddit CEO/founder (u/spez) changed his profile picture to Diamond Hands baby from wallstreetbets