It grows in price. You monitor it on yearn.finance... @curvefi

The answer to your question depends on what you are monitoring on yearn.finance. If you are monitoring the price of a token, then it will likely grow in price. However, if you are monitoring the number of tokens, then it is possible that the number of tokens will grow, but the price may remain the same or decrease. If you are harvesting yourself, then you will need to keep an eye on both the price and the number of tokens to ensure that your investment is growing.

Is it auto compound or I need to harvest myself?

I did. But I thought it grows in number of tokens rather than price