I get it what you are trying to say, but did you even think a bit before writing/posting this over here? Weird comparison but yeah.. Ok.

1. True, you get your coins right away and have full ownership as long as only your control the key, but once you lose the key, there is no way you are going to get back your precious "lands" (read coins).
 -- A responsibility you have to take for having true ownership. You can also put this responsibility to other organization, which is similar to government, and you lose the true ownership

2. If I am not wrong, you are talking about crypto currencies right? Like you are comparing bitcoin with a star? Your second point kinda makes no sense at all.
-- It is about the blockchain technology see below

3.I don't see any correlation between fiat money supply and the exchange rate of the coins. Again, increasing fiat money supply would end up being a disaster. Good luck keep up with the inflation with the increase of sudden money supply.
-- fiat money supply generally increase the total fiat income of the whole planet, and that will raise the exchange rate of cryptocurrency since the buyers are getting more fiat money each year