Bitcoin mining is energy intensive, but there are other options. Proof of Stake comes in many forms, it does not harm the environment.
The invention of Bitcoin marks a turning point in the history of finance. Through its decentralized issuance mechanism, mining, Bitcoin was able to return financial freedom to users, ensuring that no transaction can be censored or reversed by third parties. Furthermore, Bitcoin has put the currency in the hands of the people, rather than a centralized entity. This has allowed Bitcoin to prosper as a global, apolitical currency and store of value, impervious to external factors that would otherwise undermine its value and efficiency.