Lol, so, rich people should stop investing in Bitcoin? IMO, it's doesn't make any difference. Whether they stop investing or not, the ban that has been put can only be removed when the governement realizes how important Bitcoin is as a cryptocurrency.
* If I many ask what is the major reason while some countries ruling class ban bitcoin transaction?
They ban Bitcoin because they are jealous of how Bitcoin can make one operate anonymously!
* What is the negative effects using crypto as currency?
The negative effect are the same effect as normal fiat. Anyone can use it as if it were fiat, so there's no special negative effect that it comes with.
* what harm does bitcoin contributes a country that can lead to ban?
Like I said earlier, they are just jealous. There's no special harm, after all, not everyone uses it, just some percentage so why does the government have hate/jealously? IDK.
However, when they see that they can't control it anymore, they will have to choice but to remove the ban.