That is a huge discrepancy. Many exchanges creates fake volume and investors should be aware of, that some projects are a big bubble and it is  not safe investing in them.

I read a publication that most of these exchanges inflate their trade volumes which reflects on coinmarketcap. They use the trick to attract investors for listing. You can read the full article here;
https://cafe4apps.net/most-bitcoin-trading-faked-by-unregulated-exchanges-study-finds/

I think this situation isn’t worth an. Hassle or argument
When you get certain percentages increase or decrease on coinmarketcap

Just go to the exchange platform and verify all

Many projects are using bots for creating artificial liquidity for their coins. Exchanges are also generating fake volume to be more attractive to  their customers. Long term, this bubble will burst.

Interesting questions that are really very interesting to understand. I think that all this is exclusively abstract data, because there are very interesting situations when prices just fall, then capitalization on these resources falls. Everything here is very fragile.

I believe in the volume calculated by the exchanger, that is the actual data. circulation that occurs on the exchanger and is calculated in realtime

Actually, I don't feel annoying with the real or fake volume data between the exchanges because I only see what I watch on the exchange, one by one. But CMC or OMC could be our guide to determine the next trend or whatever information we want to search with that website. Maybe many people can say that one website has a fake volume data and it's not worth to follow, but if you compare with the other site, then you might get the same data. So for me, as long as I can see what is happening in the market, I don't need to take a look at the CMC or OMC because by watching on the market, we can get the real data or information.

That volume on cmc is real update or not?
fake volume can make exchange market on the top list market caps
thats like free advertisement for them . so no wonder why many exchange manipulate the volume

So are you saying you don’t believe that exchanges do manipulate their volume when it is all over the media with facts and proof that they do so, which is very wrong, I know they do so to attract more users to their platform since nobody wants to associate with exchanges that has low volumes of trade.

But, there should be a limit to everything, once they have got the number of users and volume they want, they ought to have desist from the practice and reverse back to the normal way before everyone gets exposed to their practices. Exchanges do manipulate dear and it’s the fact.

Its real updating  wash trades, (fake data)