If it becomes a big investor booking system like Airbnb, Booking or Agoda then all investors will initially become millionaires. I will buy a some.

What is the total supply for public sale?

This is the era of technology and the internet, bitcoin will grow very strongly in the future because it scarce and useful.

First I only dared to invest a small amount of money (bought Bitcoin and eth) to get experience. Then I buy alt coin using bittrex exchange. 

Many people around me do not know bitcoin, or know about bitcoin but think it is a form of stock investment.

Great ideal but the risk is high if security is not improved and it not stable.

If Bitcoin does not exist then something similar will occur I don't think Bitcoin is currently actively affecting a lot of lives.

I think Gold is physical and precious, not disappear. Bitcoin is digital, can disappear anytime. 

As I know bitcoin does not pay out profits (like shares) or rent (like property), and is not attached a national economy (like fiat currencies), so it is hard to conclude.

Every thing is possible because NEO has good team and strong community.

I spent a lot of time watching videos and reading documents but in this forum is really useful knowledge.

99% altcoin will die except BTC and some other coin will grow stronger

It is even more rare than gold, you have the opportunity to become millionaires if you invest some btc.