- There are very low transaction fees for Bitcoin transactions.
That's not always the case (huge backlog of unconfirmed transactions + multiple inputs/outputs usually lead to a higher fee).
- Bitcoin is very anonymous when compared to card payments if you use Bitcoin correctly.
It's "pseudonymous". You might want to explain the latter part (in order to not mislead newcomers).
- Early adopters, like users who have already purchased large quantities at very low prices, are already benefiting much more from the price increases.
This isn't a disadvantage (you can't list it as an advantage either, since it doesn't apply to everyone else).