the pros and cons about bitcoin are always there. If you say Bitcoin and altcoin are fake investment products that pollute the environment, it's your right to say.
But before you say bitcoin is a fake form of investment you must know the technology it has, you have to read a lot about the positive side of blockchain, bitcoin and cryptocurrency. so you can compare it.
The risk of very volatile prices is indeed a feature of bitcoin and altcoin. But Bitcoin is now a valuable digital currency.
If you don't like bitcoin and Altcoin then what is your purpose to create an account in this forum?
My purpose is to educate you that you're part of an investment scheme that thrives on new investors only. And that empirically all such schemes end up collapsing.