The presence and failure of Ponzi schemes in most countries like Nigeria, Ghana, South Africa and some Asian countries too, has contributed a great deal in discouraging the government of these countries from accepting the usefulness of bitcoin. this because most of the ponzi schemes used bitcoins as means of pledging and receiving helps. but irony of the whole thing is the same government seems not to have realized that Physical cash was also used for local ponzi donations and why have they not placed a ban on the physical cash just like bitcoin.....
Please what's bitcoin community doing to correct this wrong impression so that bitcoin can be globally accepted by all?
Do you have a source for the bolded sentence? I've never heard of a ponzi scheme that ran on Bitcoins -- rather, critics are saying that Bitcoin is a large ponzi scheme in and by itself. These people are misguided, of course, and likely has no idea what a true ponzi scheme is.
Bitcoin is an easy target for regulators because few people have actual working knowledge of them. They only have to say it's a scam, and people who have never even heard of it will believe them. Like cash, Bitcoin is only as law abiding as its user, but for some reason, people would rather turn a blind eye on that fact. The only way we can really help its reputation is to be law abiding citizens. Let people know that Bitcoin isn't always used in crime, and can actually be used to solve real world problems.