$BTC
A flower garden must have flowers, but mostly there is only grass. They cut all the flowers and only keep the grass.
Similarly, Bitcoin is the flower. It is the largest coin.
Under it are the altcoins, the grass growing below the flower.
Most will prefer grass over flowers. So they cut all the flowers and only keep the grass.
They sell Bitcoin and keep a bunch of junk coins.
Buy before it shoots up to 1 million dollars.