4 Bitcoins means that if Bitcoin took over the world you could live in a country with the 1-5 million richest people in the entire world out of 7 billion people - you would be like a Qatar prince.
Even if you're just a Joe Smo last adopter Bitcoin will let you save easily for your pension* and the economy will be healthier** with more and better jobs*** and less consumerism.
* A purely deflationary currency like Bitcoin will increase each time the economy grows as coins will be spread more thinly among more wealth. The human real-value economy/population have both grown with about 3%/yr historically. Thus simply saving 200.000$ in Bitcoin over your life time will net you 500$ per month in interest. Spending another 500$ of those savings will give you 1000->750$ per month for a 16.5 year period. If you don't retire until you really have to you should do okay with that and the left over 100.000$ I didn't include in the 16.5 years.
** The strong money nature of Bitcoin will lead to people investing in things that really make sense and buying less crap. This will favor smart businesses that make things to last and the planets environment.
*** Removing the constant economic oppression duo of fiat inflation and government war taxes persons and business will be much better off. Governments will be forced to be more efficient and provide services people want - at a reasonable price. Otherwise people will just hide their wealth with Bitcoin. You wont have to be in a constant rat race to maintain a consumerist and militaristic machine slowly falling apart under its own weight anymore - this can ONLY lead to more wealth.
Bitcoin is not just the first app for blockchain technology - that is a banker lie. Even if blockchain tech decentralized the internet, stocks/companies AND government Bitcoin would still be at least the second most important "app".
Money affects everything we do in life, the effect of making money a more efficient/fair system should not be underestimated - this is not about making a few more internet millionaires, this is much more important.