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
And why bitcoin will never be over 30K? is just because you said 10 trillion dollars unbelievable and unachievable?
Because many people will be a rich man in 3 years later?
I can't say for sure what will happen in the future, but considering bitcoin value growing in every year, if it's within $1000-$2000 and could leap even further after halving, then in 10 years later bitcoin should be worth around $25,000 it seems more realistic for me. But, who knows for sure? None of us.