2021, to mine or not to mine, that is the question

Hi guys, I like know your opinion about the future of mining in 2021. This pandemic year come with hard new for miners Ethereum, it pass from PoW to PoS and I like your opinion about our miners future. These are my questions:

  • I need buy news GPUs, is time to invest?

  • What cryptocurrency is a profitable alternative to Ethereum?

  • Solar mining, the new oportunity?

I will be pleased to read your comments