The total MC is really around that amount on the infographic, but it should be noted that 2/3 of that amount is what it refers to Bitcoin, and that another $150 billion belongs to the first two followers on the list.
True, but it's still a pretty impressive figure if you ask me--although comparing crypto and stocks leaves me with a weird feeling. It's kind of like comparing Apple's market cap to the total number of outstanding USD, i.e., they're fundamentally two different things.
A corporation's market cap is essentially how much it would take to buy it out (or to buy a controlling interest, which doesn't take 100% of the MC). It's also not necessarily a great indicator of how much the business is
actually worth, since bull and bear markets can cause the market cap to over- or under-value a given company.
On the other hand, the value of bitcoin is exactly what the market says its worth. There's no underlying company, no dividends, no profit changes from quarter-to-quarter, none of those metrics that you get with stocks. So while I'm impressed that bitcoin (and the other top altcoins) are being valued so highly, this is one of those apples to oranges comparisons IMO.
What this basically achieves could be to say how much money people willing to bet on both of these things and how mainstream we are. Crypto people love to talk about how we are not mainstream, and how fiat is mainstream and how we are just small underdogs fighting to become more used and so forth.
However if you look at the crypto market cap, we have broken over 1 trillion dollars in marketcap, nothing that has 1 trillion dollar marketcap could be underdogs, we are mainstream now and we are already known by almost everyone in the world.
I am not saying everyone "uses" it, but I can say even people who have never owned a single satoshi knows what bitcoin is and that is why this chart is important, it is there to show you that apple is one of the most known brands in the entire world, same for microsoft, and bitcoin is not really that far behind them neither.