Bitcoin is good for both, and it has proven itself many times to be vaible. I believe Bitcoin "adopters" are not just called that, they call them that because they Invest, Trade and use Bitcoin as a payment system. This has helped immensely, especially to boycott the traditional fiat ways that are slow and extortionating.

I remember when I was making cross-border payments many years ago. I had to use bank wire transfer. If the corresponding bank is involved, I might be parting ways with over $40 for just sending money. The same goes for receiving money. That is not happening anymore. Thanks to Bitcoin! It must have saved me thousands of dollars in that regard now.