Ok, so coin holders are allowed to validate transactions between other coin holders, and for that they get more coins. But if I have no coins, I have to buy th

Ok, so coin holders are allowed to validate transactions between other coin holders, and for that they get more coins. But if I have no coins, I have to buy them from a coin holder with another form of money. So this system would require the original issuer to be someone that you trust and have a reason to do business with in the first place right? So it's kind of like banks and central banks today? I realize ICOs by startups are a thing but I kind of want to just ignore that whole phenomenon... I don't own any kind of coin and don't understand it well enough, but this seems to me to be a technology that will eventually be very useful.