I still don't get it. If people are buying and the value is not there, they will loose money, right? Speculators can also bid on a lower price (derivatives), ri

I still don't get it. If people are buying and the value is not there, they will loose money, right? Speculators can also bid on a lower price (derivatives), right? So, who are all those crazy people bidding only in 1 direction (higher prices)?