1. Bitcoin will probably make a lot of people rich especially for long term holders... again
Probably, but generally you have to be significantly invested in to see any meaningful return, at least in the terms of "rich".
2. Bitcoin is the future and bitcoin is the medium of exchange because it is widely accepted, portable, shareable, accessible, commensurate and relatively stable. That's why it will be used as future currency.
I kind of agree, and disagree here. I'm not sure if it's the entire future, likely there will always be other currencies floating around, especially now the world has been introduced to cryptocurrencies. I don't know if it's the future for the majority of people, but I know it's the future for me. Unless something crazy goes on, where another altcoin comes out, and massively outclasses Bitcoin, since the popularity of Bitcoin right now, means it'll have some resistance to certain altcoins which marginally improve on it.
3. Bitcoin can save the world
Hmm, probably not. As with everything, the rich will hoard a lot of the Bitcoin, and the poor will be late to the party. Obviously, Bitcoin can increase denominations to make Bitcoin worth using, but the rich elite will always remain the rich elite. Bitcoin does provide a path that isn't typically available to people though, which means they might find some success they otherwise wouldn't. The Blockchain definitely has its uses, and it might make things more comfortable in terms of transparency, but I still don't think it'll save the world as you put it.
4. Bitcoin is not very easy to understand and there is too much misinformation about it.
Myself, and others have always said this is the biggest obstacle Bitcoin has. The complexity means that not everyone is going to understand or be comfortable with using it, even if they like the sound of the freedom it provides.
5. Bitcoin has spread far, far more than most people know. There are already some of the biggest companies in the world using blockchain technology and some countries actually want to clone bitcoin, because bitcoin is so good.
Goes without saying. Anything good in this world, will be replicated a million times. Doesn't mean it's any better though. As we've seen over the years many have tried to become the next Bitcoin, but Bitcoin had everything in place, and basically was implemented at the right time to assure its success. It doesn't have gimmick features, it has features that were carefully thought out, and even though it might have not been implemented perfectly, it has been improved on since.