In Wikipedia can write any idiot an article.
We must contest the article and if enough people do it then it will be corrected.
People who don't edit Wikipedia and know its rules and behaviors should not make entering an edit war their first participation. The inclusion of Bitcoin on this list as a Ponzi is simply incorrect by Wikipedia's rules and not justified, in particular by
WP:RS, the Reliable Source policy. The list is a list of Ponzis, not a list of things anyone anywhere has ever accused of being a scam.
In any event, someone has already reverted that edit. I'm sure there are Wikipedians here who will stay on top of it.
The very fact there has been a Ponzi scam involving Bitcoin shows that Bitcoin, itself, is not a Ponzi scam, any more than a tire is a car. It, like dollars or gold or anything else that could be used in a Ponzi scam, is a commodity. It's like claiming the dollar is a Ponzi scam because Charles Ponzi stole dollars using a Ponzi scam. Or the dollar is bank robbery because Willie Sutton robbed banks of dollars. It's insane troll logic.