The involvement of banks in the cryptocurrency market is a complex issue with both potential benefits and drawbacks. On the one hand, banks are well-positioned to provide a secure and regulated environment for individuals and businesses to buy, sell, and store cryptocurrencies. They can also offer valuable services such as custody and risk management to institutional investors interested in investing in cryptocurrencies.

On the other hand, some people argue that the involvement of banks in the cryptocurrency market could lead to increased centralization and regulation, which could go against the decentralized and borderless nature of cryptocurrencies. Additionally, some critics argue that banks may be getting involved in the cryptocurrency market purely for profit and may not have the best interests of their customers in mind. Regarding your question about taxation, it's true that if a company invests in cryptocurrencies through a bank account, the government could potentially tax the profits generated from those investments.