I have 2,143 YFII2S coins. why when the price went up now I only have 21 coins? where are my other 2,122 coins?I'm never sell my YFII2S coins.

Answer

YFII2S is undergo a reverse split mechanism. If you trade leverage token then it is assumed you have passed the test which is mentioning the risk of leverage token.
You can check again about leveraged token here :https://pionex.zendesk.com/hc/en-us/articles/360049185674-What-are-Pionex-Leveraged-Tokens

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