The same things that normal financial systems enable you, but without a central authority. It's trustless, permissionless, completely transparent, uncensorable, borderless open financial system. If you think that all of that is just pure speculation, I don't know what to say.

Just go through github, whitepapers and technical discussions to see the serious side of the industry, rather than being stuck to the surface level of fraudsters/speculators promising 100x money returns on social media.