the ethics of investing in crypto

So I thought I would ask all you intelligent folk a question:

1. Are there any risks to investing in cryptocurrency from an ethical perspective?

For example- are we taking away capital from other areas such as traditional arts etc?

1. If there were a crypto crash - would this just be a market correction - or would it be the end of crypto currency?

2. What is the best use case for cryptocurrency that anyone has seen out there.