innosilicon a10 pro+

Hello guys. I would like to mine ETH and have few questions. 1- is it more profitable to mine on GPU or ASIC in the long-term? (I was thinking of RTX 3080 vs Innosilicon A10 Pro+. ) 2-Should I buy it now or wait? 3-Where can I buy it with stock and in the end, do you think is it worth it or not...