I've read a lot of articles about people claiming bitcoin will be worth millions in the future, for example John mcAfee recently said bitcoin will be 500K in 3 years.
Now, imagine if this was true, and it was in fact 500K/BTC. The total market cap would then be 10.500.000.000.000, or about 10 trillion dollars. This is an unbelievable and unachievable amount of money. Even if we ignore the market caps, imagine how many people would become rich? Millions would become millionairs, hundreds would become billionaires, all in a matter of 3 years. This would cripple the global economy as we know it.
My best guess is that, in 10 years, bitcoin might be around it's absolute peak of 30K, giving it a total market cap of about 630.000.000.000$, or 630 billion. The total market cap of cryptos would then be around 2 trillion if the some of the better alts gain more traction. I believe this is fairly realistic. This means BTC would have to rise with around 7 - 8$ a day.
Edited
If you are basing this on what McAfee said, then I would say you actually dignify him by creating a thread in his honour and based on your calculation I see it largely impossible for 500k to be achieved in 3 years maybe in the future when the whole countries in the world is being represented like we have in forex, but not in 2020 at all. However, the 30k is possible but at the same time not without its own challenges which I don't see not coming on a regular basis to swing the price backwards.
The mcAfee one is just one I read a few days ago, there's tonnes of articles, videos, blogs and such from people talking about a 7-digit bitcoin within this decade.