YFI came to limelight after the value increased exceeding the value of Bitcoin. I learnt that YFI was listed at about 90$, but in a space of less than two months, the value rose to over $30k. The major reason for this level of increase is because of the low supply of the tokens. I learnt that the total supply of the tokens is 30,000 and there was no tokens sales. The early holders of the token earned it from providing liquidity for other yearn finance tokens.