There are clear reasons why Silicon Valley or Shenzhen are synonymous with high technologies – they are the place where entrepreneurs and businesses in this field have created their ecosystem, and accordingly attract those who want to break into the industry.
To create Silicon Valleys in Poland and Europe, recognize that they cannot be designed and that the winners and losers they comprise cannot be predicted. Especially by governments. Focus instead on creating the right climate and environment: attractive taxes and unobtrusive regulation. Trust in freedom and free markets.